131210120321 has 32 divisors (see below), whose sum is σ = 155518218240. Its totient is φ = 108366201216.

The previous prime is 131210120267. The next prime is 131210120329. The reversal of 131210120321 is 123021012131.

It is a de Polignac number, because none of the positive numbers 2^k-131210120321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131210120321.

It is not an unprimeable number, because it can be changed into a prime (131210120329) 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, 47247485 + ... + 47250261.

It is an arithmetic number, because the mean of its divisors is an integer number (4859944320).

Almost surely, 2^131210120321 is an apocalyptic number.

It is an amenable number.

131210120321 is a deficient number, since it is larger than the sum of its proper divisors (24308097919).

131210120321 is a wasteful number, since it uses less digits than its factorization.

131210120321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4893.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131210120321 its reverse (123021012131), we get a palindrome (254231132452).

The spelling of 131210120321 in words is "one hundred thirty-one billion, two hundred ten million, one hundred twenty thousand, three hundred twenty-one".