General fact: 2129 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 2129 is an unremarkable number.
Trivia: 2129 is an uninteresting number.
Historical date: October 29th is the day in 1985 that Major General Samuel K. Doe is announced the winner of the first multi-party election in Liberia.