13131201000021 has 16 divisors (see below), whose sum is σ = 18935980854336. Its totient is φ = 8046057787776.

The previous prime is 13131201000017. The next prime is 13131201000059. The reversal of 13131201000021 is 12000010213131.

It is a happy number.

It is not a de Polignac number, because 13131201000021 - 2² = 13131201000017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131201000121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722517655 + ... + 722535828.

It is an arithmetic number, because the mean of its divisors is an integer number (1183498803396).

Almost surely, 2^{13131201000021} is an apocalyptic number.

It is an amenable number.

13131201000021 is a deficient number, since it is larger than the sum of its proper divisors (5804779854315).

13131201000021 is a wasteful number, since it uses less digits than its factorization.

13131201000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445053732.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 13131201000021 its reverse (12000010213131), we get a palindrome (25131211213152).

The spelling of 13131201000021 in words is "thirteen trillion, one hundred thirty-one billion, two hundred one million, twenty-one", and thus it is an aban number.