Fatto generale: 21551 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 21551 is a boring number.
Trivia: 21551 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: January 1st is the day in 1996 that Curaçao gains limited self-government, though it remains within free association with the Netherlands.