131021210043313 has 4 divisors (see below), whose sum is σ = 131023467180900. Its totient is φ = 131018952905728.

The previous prime is 131021210043293. The next prime is 131021210043323. The reversal of 131021210043313 is 313340012120131.

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 109215186668449 + 21806023374864 = 10450607^2 + 4669692^2 .

It is a cyclic number.

It is not a de Polignac number, because 131021210043313 - 2²⁹ = 131020673172401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131021210043323) 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, 1128481720 + ... + 1128597817.

It is an arithmetic number, because the mean of its divisors is an integer number (32755866795225).

Almost surely, 2^{131021210043313} is an apocalyptic number.

It is an amenable number.

131021210043313 is a deficient number, since it is larger than the sum of its proper divisors (2257137587).

131021210043313 is an equidigital number, since it uses as much as digits as its factorization.

131021210043313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257137586.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 131021210043313 its reverse (313340012120131), we get a palindrome (444361222163444).

The spelling of 131021210043313 in words is "one hundred thirty-one trillion, twenty-one billion, two hundred ten million, forty-three thousand, three hundred thirteen".