13021322231231 has 4 divisors (see below), whose sum is σ = 13021598218200. Its totient is φ = 13021046244264.

The previous prime is 13021322231219. The next prime is 13021322231257. The reversal of 13021322231231 is 13213222312031.

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

It is a cyclic number.

It is not a de Polignac number, because 13021322231231 - 2⁶ = 13021322231167 is a prime.

It is a super-2 number, since 2×13021322231231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13021322231231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021322231831) 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, 137922701 + ... + 138017078.

It is an arithmetic number, because the mean of its divisors is an integer number (3255399554550).

Almost surely, 2^{13021322231231} is an apocalyptic number.

13021322231231 is a deficient number, since it is larger than the sum of its proper divisors (275986969).

13021322231231 is an equidigital number, since it uses as much as digits as its factorization.

13021322231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275986968.

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

Adding to 13021322231231 its reverse (13213222312031), we get a palindrome (26234544543262).

The spelling of 13021322231231 in words is "thirteen trillion, twenty-one billion, three hundred twenty-two million, two hundred thirty-one thousand, two hundred thirty-one".