13011021231331 has 4 divisors (see below), whose sum is σ = 13430731593664. Its totient is φ = 12591310869000.

The previous prime is 13011021231319. The next prime is 13011021231359. The reversal of 13011021231331 is 13313212011031.

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 13011021231331 - 2¹⁵ = 13011021198563 is a prime.

It is a super-2 number, since 2×13011021231331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13011021231311) 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, 209855181120 + ... + 209855181181.

It is an arithmetic number, because the mean of its divisors is an integer number (3357682898416).

Almost surely, 2^{13011021231331} is an apocalyptic number.

13011021231331 is a deficient number, since it is larger than the sum of its proper divisors (419710362333).

13011021231331 is an equidigital number, since it uses as much as digits as its factorization.

13011021231331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419710362332.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 13011021231331 its reverse (13313212011031), we get a palindrome (26324233242362).

The spelling of 13011021231331 in words is "thirteen trillion, eleven billion, twenty-one million, two hundred thirty-one thousand, three hundred thirty-one".