131310231321 has 4 divisors (see below), whose sum is σ = 175080308432. Its totient is φ = 87540154212.

The previous prime is 131310231307. The next prime is 131310231337. The reversal of 131310231321 is 123132013131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 131310231321 - 2⁷ = 131310231193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131310231341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21885038551 + ... + 21885038556.

It is an arithmetic number, because the mean of its divisors is an integer number (43770077108).

Almost surely, 2^131310231321 is an apocalyptic number.

It is an amenable number.

131310231321 is a deficient number, since it is larger than the sum of its proper divisors (43770077111).

131310231321 is an equidigital number, since it uses as much as digits as its factorization.

131310231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43770077110.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 131310231321 its reverse (123132013131), we get a palindrome (254442244452).

The spelling of 131310231321 in words is "one hundred thirty-one billion, three hundred ten million, two hundred thirty-one thousand, three hundred twenty-one".