Fatto generale: 21193 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 21193 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 21193 is an uninteresting number.
Data storica: January 8th is the day in 1963 that Leonardo da Vinci's Mona Lisa is exhibited in the United States for the first time, at the National Gallery of Art in Washington, D.C.