Fatto generale: 2099 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2099 is an unremarkable number.
Trivia: 2099 is an uninteresting number.
Data storica: September 29th is the day in 61 BC that Pompey the Great celebrates his third triumph for victories over the pirates and the end of the Mithridatic Wars on his 45th birthday.