131212011431021 has 4 divisors (see below), whose sum is σ = 131212036184352. Its totient is φ = 131211986677692.

The previous prime is 131212011430999. The next prime is 131212011431041. The reversal of 131212011431021 is 120134110212131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131212011431021 - 2³⁰ = 131210937689197 is a prime.

It is a super-2 number, since 2×131212011431021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131212011431041) 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, 842465 + ... + 16221398.

It is an arithmetic number, because the mean of its divisors is an integer number (32803009046088).

Almost surely, 2^{131212011431021} is an apocalyptic number.

It is an amenable number.

131212011431021 is a deficient number, since it is larger than the sum of its proper divisors (24753331).

131212011431021 is an equidigital number, since it uses as much as digits as its factorization.

131212011431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24753330.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 131212011431021 its reverse (120134110212131), we get a palindrome (251346121643152).

The spelling of 131212011431021 in words is "one hundred thirty-one trillion, two hundred twelve billion, eleven million, four hundred thirty-one thousand, twenty-one".