Attached files
Exhibit 31.1
CERTIFICATIONS
I, Robert P. Johnson, certify that:
1. I have reviewed this annual report on Form 10-K of AEI
Income & Growth Fund XXI Limited Partnership;
2. Based on my knowledge, this report does not contain any
untrue statement of a material fact or omit to state a
material fact necessary to make the statements made, in
light of the circumstances under which such statements were
made, not misleading with respect to the period covered by
this report;
3. Based on my knowledge, the financial statements, and
other financial information included in this report, fairly
present in all material respects the financial condition,
results of operations and cash flows of the registrant as
of, and for, the periods presented in this report;
4. The registrant's other certifying officer and I are
responsible for establishing and maintaining disclosure
controls and procedures (as defined in Exchange Act Rules
13a-15(e) and 15d-15(e)) and internal control over financial
reporting (as defined in Exchange Act Rules 13a-15(f) and
15d-15(f)) for the registrant and have:
a) Designed such disclosure controls and procedures, or
caused such disclosure controls and procedures to be
designed under our supervision, to ensure that material
information relating to the registrant, including its
consolidated subsidiaries, is made known to us by others
within those entities, particularly during the period in
which this report is being prepared;
b) Designed such internal control over financial
reporting, or caused such internal control over financial
reporting to be designed under our supervision, to provide
reasonable assurance regarding the reliability of financial
reporting and the preparation of financial statements for
external purposes in accordance with generally accepted
accounting principles;
c) Evaluated the effectiveness of the registrant's
disclosure controls and procedures and presented in this
report our conclusions about the effectiveness of the
disclosure controls and procedures, as of the end of the
period covered by this report based on such evaluation; and
d) Disclosed in this report any change in the registrant's
internal control over financial reporting that occurred
during the registrant's most recent fiscal quarter (the
registrant's fourth fiscal quarter in the case of an annual
report) that has materially affected, or is reasonably
likely to materially affect, the registrant's internal
control over financial reporting; and
5. The registrant's other certifying officer and I have
disclosed, based on our most recent evaluation of internal
control over financial reporting, to the registrant's
auditors and the audit committee of the registrant's board
of directors (or persons performing the equivalent
functions):
a) All significant deficiencies and material weaknesses in
the design or operation of internal control over financial
reporting which are reasonably likely to adversely affect
the registrant's ability to record, process, summarize and
report financial information; and
b) Any fraud, whether or not material, that involves
management or other employees who have a significant role in
the registrant's internal control over financial reporting.
Date: March 25, 2011 /s/ ROBERT P JOHNSON
Robert P. Johnson, President
AEI Fund Management XXI, Inc.
Managing General Partne