13023131111021 has 4 divisors (see below), whose sum is σ = 13187980872000. Its totient is φ = 12858281350044.

The previous prime is 13023131110921. The next prime is 13023131111041. The reversal of 13023131111021 is 12011113132031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13023131111021 - 2³⁸ = 12748253204077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13023131110984 and 13023131111002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13023131111041) 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, 82424880371 + ... + 82424880528.

It is an arithmetic number, because the mean of its divisors is an integer number (3296995218000).

Almost surely, 2^{13023131111021} is an apocalyptic number.

It is an amenable number.

13023131111021 is a deficient number, since it is larger than the sum of its proper divisors (164849760979).

13023131111021 is an equidigital number, since it uses as much as digits as its factorization.

13023131111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164849760978.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 13023131111021 its reverse (12011113132031), we get a palindrome (25034244243052).

The spelling of 13023131111021 in words is "thirteen trillion, twenty-three billion, one hundred thirty-one million, one hundred eleven thousand, twenty-one".