Fatto generale: 21952 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 21952 is an unremarkable number.
Trivia: 21952 is an uninteresting number.
Data storica: February 6th is the day in 1843 that the first minstrel show in the United States, The Virginia Minstrels, opens (Bowery Amphitheatre in New York City).