general_fact: 21862 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 21862 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 21862 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: November 8th is the day in 1519 that Hernán Cortés enters Tenochtitlán and Aztec ruler Moctezuma welcomes him with a great celebration.