131203321222013 has 4 divisors (see below), whose sum is σ = 131204072636700. Its totient is φ = 131202569807328.

The previous prime is 131203321222009. The next prime is 131203321222027. The reversal of 131203321222013 is 310222123302131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33228918389209 + 97974402832804 = 5764453^2 + 9898202^2 .

It is a cyclic number.

It is not a de Polignac number, because 131203321222013 - 2² = 131203321222009 is a prime.

It is a super-2 number, since 2×131203321222013² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131203321222063) 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, 375445370 + ... + 375794667.

It is an arithmetic number, because the mean of its divisors is an integer number (32801018159175).

Almost surely, 2^{131203321222013} is an apocalyptic number.

It is an amenable number.

131203321222013 is a deficient number, since it is larger than the sum of its proper divisors (751414687).

131203321222013 is an equidigital number, since it uses as much as digits as its factorization.

131203321222013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751414686.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 131203321222013 its reverse (310222123302131), we get a palindrome (441425444524144).

The spelling of 131203321222013 in words is "one hundred thirty-one trillion, two hundred three billion, three hundred twenty-one million, two hundred twenty-two thousand, thirteen".