Fatto matematico: 2112 is the number of subsets of {1, 1/2, 1/3, ... 1/36} that sum to an integer.
Trivia: 2112 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: October 12th is the day in 1793 that the cornerstone of Old East, the oldest state university building in the United States, is laid on the campus of the University of North Carolina.