2129

2129 may refer to the year in the Gregorian calendar or to the integer 2129. In the Gregorian calendar, 2129 is a common year starting on Saturday in the 22nd century. Consequently, January 1, 2129 falls on a Saturday, and December 31, 2129 falls on a Saturday.

As a number, 2129 is prime. It is odd and not divisible by 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, or 43. Its primality means it has no positive divisors other than 1 and itself.

In historical and cultural contexts, 2129 would be the 2129th year of the Anno Domini era. It lies within the 2120s decade of the 22nd century. The year is not a leap year, since it is not divisible by 4, and it would advance the calendar by one day relative to the previous year.