Fatto generale: 82100 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 82100 is an unremarkable number.
Trivia: 82100 is a boring number.
Data storica: October 12th is the day in 1983 that Japan's former Prime Minister Tanaka Kakuei is found guilty of taking a $2 million bribe from Lockheed and is sentenced to 4 years in jail.