131121321313 has 4 divisors (see below), whose sum is σ = 131467288240. Its totient is φ = 130775354388.

The previous prime is 131121321301. The next prime is 131121321329. The reversal of 131121321313 is 313123121131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 313123121131 = 4547 ⋅68863673.

It is a cyclic number.

It is not a de Polignac number, because 131121321313 - 2⁹ = 131121320801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131121321413) 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, 172982895 + ... + 172983652.

It is an arithmetic number, because the mean of its divisors is an integer number (32866822060).

Almost surely, 2^131121321313 is an apocalyptic number.

It is an amenable number.

131121321313 is a deficient number, since it is larger than the sum of its proper divisors (345966927).

131121321313 is an equidigital number, since it uses as much as digits as its factorization.

131121321313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345966926.

The product of its digits is 324, while the sum is 22.

Adding to 131121321313 its reverse (313123121131), we get a palindrome (444244442444).

The spelling of 131121321313 in words is "one hundred thirty-one billion, one hundred twenty-one million, three hundred twenty-one thousand, three hundred thirteen".