13021320133231 has 4 divisors (see below), whose sum is σ = 13022309683600. Its totient is φ = 13020330582864.

The previous prime is 13021320133201. The next prime is 13021320133259. The reversal of 13021320133231 is 13233102312031.

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 13021320133231 - 2⁷ = 13021320133103 is a prime.

It is a super-2 number, since 2×13021320133231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13021320133196 and 13021320133205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021320133201) 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, 494755446 + ... + 494781763.

It is an arithmetic number, because the mean of its divisors is an integer number (3255577420900).

Almost surely, 2^{13021320133231} is an apocalyptic number.

13021320133231 is a deficient number, since it is larger than the sum of its proper divisors (989550369).

13021320133231 is an equidigital number, since it uses as much as digits as its factorization.

13021320133231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989550368.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 13021320133231 its reverse (13233102312031), we get a palindrome (26254422445262).

The spelling of 13021320133231 in words is "thirteen trillion, twenty-one billion, three hundred twenty million, one hundred thirty-three thousand, two hundred thirty-one".