General fact: 21602 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 21602 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 21602 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: February 21st is the day in 1952 that the British government, under Winston Churchill, abolishes identity cards in the UK to "set the people free".