131335431321 has 16 divisors (see below), whose sum is σ = 175803606144. Its totient is φ = 87212521344.

The previous prime is 131335431317. The next prime is 131335431341. The reversal of 131335431321 is 123134533131.

It is a happy number.

It is not a de Polignac number, because 131335431321 - 2² = 131335431317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131335431301) 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, 1232455 + ... + 1334771.

It is an arithmetic number, because the mean of its divisors is an integer number (10987725384).

Almost surely, 2^131335431321 is an apocalyptic number.

It is an amenable number.

131335431321 is a deficient number, since it is larger than the sum of its proper divisors (44468174823).

131335431321 is a wasteful number, since it uses less digits than its factorization.

131335431321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104000.

The product of its digits is 9720, while the sum is 30.

Adding to 131335431321 its reverse (123134533131), we get a palindrome (254469964452).

The spelling of 131335431321 in words is "one hundred thirty-one billion, three hundred thirty-five million, four hundred thirty-one thousand, three hundred twenty-one".