12201999972 has 12 divisors (see below), whose sum is σ = 28471333296. Its totient is φ = 4067333320.

The previous prime is 12201999967. The next prime is 12201999977. The reversal of 12201999972 is 27999910221.

It is an interprime number because it is at equal distance from previous prime (12201999967) and next prime (12201999977).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (12201999977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508416654 + ... + 508416677.

It is an arithmetic number, because the mean of its divisors is an integer number (2372611108).

Almost surely, 2^12201999972 is an apocalyptic number.

12201999972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12201999972 is an abundant number, since it is smaller than the sum of its proper divisors (16269333324).

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

12201999972 is a wasteful number, since it uses less digits than its factorization.

12201999972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016833338 (or 1016833336 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 51.

The spelling of 12201999972 in words is "twelve billion, two hundred one million, nine hundred ninety-nine thousand, nine hundred seventy-two".