12021552012 has 24 divisors (see below), whose sum is σ = 28307633200. Its totient is φ = 3970420416.

The previous prime is 12021551987. The next prime is 12021552043. The reversal of 12021552012 is 21025512021.

It is a self number, because there is not a number n which added to its sum of digits gives 12021552012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4594087 + ... + 4596702.

Almost surely, 2^12021552012 is an apocalyptic number.

12021552012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12021552012 is an abundant number, since it is smaller than the sum of its proper divisors (16286081188).

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

12021552012 is a wasteful number, since it uses less digits than its factorization.

12021552012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9190905 (or 9190903 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The spelling of 12021552012 in words is "twelve billion, twenty-one million, five hundred fifty-two thousand, twelve".