12280921989 has 24 divisors (see below), whose sum is σ = 19052677728. Its totient is φ = 7015932000.

The previous prime is 12280921973. The next prime is 12280921993. The reversal of 12280921989 is 98912908221.

It is not a de Polignac number, because 12280921989 - 2⁴ = 12280921973 is a prime.

It is a super-2 number, since 2×12280921989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12280921969) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 801054 + ... + 816240.

It is an arithmetic number, because the mean of its divisors is an integer number (793861572).

Almost surely, 2^12280921989 is an apocalyptic number.

It is an amenable number.

12280921989 is a deficient number, since it is larger than the sum of its proper divisors (6771755739).

12280921989 is a wasteful number, since it uses less digits than its factorization.

12280921989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20705 (or 20698 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 51.

The spelling of 12280921989 in words is "twelve billion, two hundred eighty million, nine hundred twenty-one thousand, nine hundred eighty-nine".