131121052313 has 4 divisors (see below), whose sum is σ = 135642467940. Its totient is φ = 126599636688.

The previous prime is 131121052273. The next prime is 131121052417. The reversal of 131121052313 is 313250121131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313250121131 = 1427 ⋅219516553.

It can be written as a sum of positive squares in 2 ways, for example, as 107421373504 + 23699678809 = 327752^2 + 153947^2 .

It is a cyclic number.

It is not a de Polignac number, because 131121052313 - 2³² = 126826085017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131121652313) 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, 2260707770 + ... + 2260707827.

It is an arithmetic number, because the mean of its divisors is an integer number (33910616985).

Almost surely, 2^131121052313 is an apocalyptic number.

It is an amenable number.

131121052313 is a deficient number, since it is larger than the sum of its proper divisors (4521415627).

131121052313 is an equidigital number, since it uses as much as digits as its factorization.

131121052313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521415626.

The product of its (nonzero) digits is 540, while the sum is 23.

Adding to 131121052313 its reverse (313250121131), we get a palindrome (444371173444).

The spelling of 131121052313 in words is "one hundred thirty-one billion, one hundred twenty-one million, fifty-two thousand, three hundred thirteen".