12000999972 has 24 divisors (see below), whose sum is σ = 30156359296. Its totient is φ = 3692615328.

The previous prime is 12000999949. The next prime is 12000999973. The reversal of 12000999972 is 27999900021.

It is not an unprimeable number, because it can be changed into a prime (12000999973) 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, 38464588 + ... + 38464899.

Almost surely, 2^12000999972 is an apocalyptic number.

12000999972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12000999972 is an abundant number, since it is smaller than the sum of its proper divisors (18155359324).

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

12000999972 is a wasteful number, since it uses less digits than its factorization.

12000999972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76929507 (or 76929505 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 48.

The spelling of 12000999972 in words is "twelve billion, nine hundred ninety-nine thousand, nine hundred seventy-two".