Fait général: 21006 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21006 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 21006 is an uninteresting number.
Date historique: July 5th is the day in 1998 that Japan launches a probe to Mars, and thus joins the United States and Russia as a space exploring nation.