131031102210121 has 32 divisors (see below), whose sum is σ = 140225087647008. Its totient is φ = 122011518074880.

The previous prime is 131031102210101. The next prime is 131031102210161. The reversal of 131031102210121 is 121012201130131.

It can be written as a sum of positive squares in 16 ways, for example, as 30638317265721 + 100392784944400 = 5535189^2 + 10019620^2 .

It is a cyclic number.

It is not a de Polignac number, because 131031102210121 - 2⁷ = 131031102209993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131031102210101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390945591 + ... + 391280611.

It is an arithmetic number, because the mean of its divisors is an integer number (4382033988969).

Almost surely, 2^{131031102210121} is an apocalyptic number.

It is an amenable number.

131031102210121 is a deficient number, since it is larger than the sum of its proper divisors (9193985436887).

131031102210121 is a wasteful number, since it uses less digits than its factorization.

131031102210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335901.

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

Adding to 131031102210121 its reverse (121012201130131), we get a palindrome (252043303340252).

The spelling of 131031102210121 in words is "one hundred thirty-one trillion, thirty-one billion, one hundred two million, two hundred ten thousand, one hundred twenty-one".