131320120031 has 6 divisors (see below), whose sum is σ = 139499228160. Its totient is φ = 123595406816.

The previous prime is 131320120027. The next prime is 131320120067. The reversal of 131320120031 is 130021023131.

It is not a de Polignac number, because 131320120031 - 2² = 131320120027 is a prime.

It is a super-2 number, since 2×131320120031² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131320119991 and 131320120009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131320120331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 227197151 + ... + 227197728.

It is an arithmetic number, because the mean of its divisors is an integer number (23249871360).

Almost surely, 2^131320120031 is an apocalyptic number.

131320120031 is a deficient number, since it is larger than the sum of its proper divisors (8179108129).

131320120031 is an equidigital number, since it uses as much as digits as its factorization.

131320120031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454394913 (or 454394896 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 131320120031 its reverse (130021023131), we get a palindrome (261341143162).

The spelling of 131320120031 in words is "one hundred thirty-one billion, three hundred twenty million, one hundred twenty thousand, thirty-one".