131321331231 has 32 divisors (see below), whose sum is σ = 184235696640. Its totient is φ = 83042217984.

The previous prime is 131321331203. The next prime is 131321331233. The reversal of 131321331231 is 132133123131.

It is not a de Polignac number, because 131321331231 - 2²⁵ = 131287776799 is a prime.

It is a super-2 number, since 2×131321331231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131321331233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9625791 + ... + 9639423.

It is an arithmetic number, because the mean of its divisors is an integer number (5757365520).

Almost surely, 2^131321331231 is an apocalyptic number.

131321331231 is a deficient number, since it is larger than the sum of its proper divisors (52914365409).

131321331231 is a wasteful number, since it uses less digits than its factorization.

131321331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14815.

The product of its digits is 972, while the sum is 24.

Adding to 131321331231 its reverse (132133123131), we get a palindrome (263454454362).

The spelling of 131321331231 in words is "one hundred thirty-one billion, three hundred twenty-one million, three hundred thirty-one thousand, two hundred thirty-one".