Fatto matematico: 21267 is an unremarkable number.
Trivia: 21267 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: March 23rd is the day in 1931 that Bhagat Singh, Shivaram Rajguru and Sukhdev Thapar are hanged for murder during the Indian struggle for independence.