Fatto generale: 21229 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 21229 is a boring number.
Trivia: 21229 is an unremarkable number.
Data storica: February 13th is the day in 1954 that Frank Selvy becomes the only NCAA Division I basketball player ever to score 100 points in a single game.