Fatto generale: 21262 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 21262 is an uninteresting number.
Trivia: 21262 is a boring number.
Data storica: March 18th is the day in 1969 that the United States begins secretly bombing the Sihanouk Trail in Cambodia, used by communist forces to infiltrate South Vietnam.