Fatto matematico: 21097 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 21097 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: October 4th is the day in 1967 that Omar Ali Saifuddin III of Brunei abdicates in favour of his son, His Majesty Sultan Hassanal Bolkiah.