131211210013021 has 16 divisors (see below), whose sum is σ = 133118690716800. Its totient is φ = 129305388119040.

The previous prime is 131211210012989. The next prime is 131211210013031. The reversal of 131211210013021 is 120310012112131.

It is a cyclic number.

It is not a de Polignac number, because 131211210013021 - 2⁵ = 131211210012989 is a prime.

It is a super-2 number, since 2×131211210013021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131211210013021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211210013031) 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, 4145809005 + ... + 4145840653.

It is an arithmetic number, because the mean of its divisors is an integer number (8319918169800).

Almost surely, 2^{131211210013021} is an apocalyptic number.

It is an amenable number.

131211210013021 is a deficient number, since it is larger than the sum of its proper divisors (1907480703779).

131211210013021 is a wasteful number, since it uses less digits than its factorization.

131211210013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55956.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 131211210013021 its reverse (120310012112131), we get a palindrome (251521222125152).

The spelling of 131211210013021 in words is "one hundred thirty-one trillion, two hundred eleven billion, two hundred ten million, thirteen thousand, twenty-one".