Fatto generale: 21499 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 21499 is an uninteresting number.
Trivia: 21499 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: November 10th is the day in 1293 that Raden Wijaya is crowned as the first monarch of Majapahit kingdom of Java, taking throne name Kertarajasa Jayawardhana.