13312230131021 has 4 divisors (see below), whose sum is σ = 13636918670844. Its totient is φ = 12987541591200.

The previous prime is 13312230131003. The next prime is 13312230131093. The reversal of 13312230131021 is 12013103221331.

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 1177248870121 + 12134981260900 = 1085011^2 + 3483530^2 .

It is a cyclic number.

It is not a de Polignac number, because 13312230131021 - 2²⁶ = 13312163022157 is a prime.

It is a super-2 number, since 2×13312230131021² (a number of 27 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 (13312230133021) 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, 162344269850 + ... + 162344269931.

It is an arithmetic number, because the mean of its divisors is an integer number (3409229667711).

Almost surely, 2^{13312230131021} is an apocalyptic number.

It is an amenable number.

13312230131021 is a deficient number, since it is larger than the sum of its proper divisors (324688539823).

13312230131021 is an equidigital number, since it uses as much as digits as its factorization.

13312230131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324688539822.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 13312230131021 its reverse (12013103221331), we get a palindrome (25325333352352).

The spelling of 13312230131021 in words is "thirteen trillion, three hundred twelve billion, two hundred thirty million, one hundred thirty-one thousand, twenty-one".