general_fact: 21275 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 21275 is an unremarkable number.
trivia: 21275 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: March 31st is the day in 1949 that the Dominion of Newfoundland joins the Canadian Confederation and becomes the 10th Province of Canada.