12999724972 has 24 divisors (see below), whose sum is σ = 24655544816. Its totient is φ = 5961653568.

The previous prime is 12999724961. The next prime is 12999724979. The reversal of 12999724972 is 27942799921.

It is a self number, because there is not a number n which added to its sum of digits gives 12999724972.

It is not an unprimeable number, because it can be changed into a prime (12999724979) 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, 787998 + ... + 804325.

Almost surely, 2^12999724972 is an apocalyptic number.

It is an amenable number.

12999724972 is a deficient number, since it is larger than the sum of its proper divisors (11655819844).

12999724972 is a wasteful number, since it uses less digits than its factorization.

12999724972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592497 (or 1592495 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 61.

The spelling of 12999724972 in words is "twelve billion, nine hundred ninety-nine million, seven hundred twenty-four thousand, nine hundred seventy-two".