12123964272 has 40 divisors (see below), whose sum is σ = 35794562176. Its totient is φ = 3463989696.

The previous prime is 12123964271. The next prime is 12123964283. The reversal of 12123964272 is 27246932121.

It is a self number, because there is not a number n which added to its sum of digits gives 12123964272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123964271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18041278 + ... + 18041949.

Almost surely, 2^12123964272 is an apocalyptic number.

12123964272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12123964272 is an abundant number, since it is smaller than the sum of its proper divisors (23670597904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12123964272 is a wasteful number, since it uses less digits than its factorization.

12123964272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36083245 (or 36083239 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The spelling of 12123964272 in words is "twelve billion, one hundred twenty-three million, nine hundred sixty-four thousand, two hundred seventy-two".