13231120023021 has 4 divisors (see below), whose sum is σ = 17641493364032. Its totient is φ = 8820746682012.

The previous prime is 13231120023001. The next prime is 13231120023049. The reversal of 13231120023021 is 12032002113231.

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 not a de Polignac number, because 13231120023021 - 2³¹ = 13228972539373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231120023001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2205186670501 + ... + 2205186670506.

It is an arithmetic number, because the mean of its divisors is an integer number (4410373341008).

Almost surely, 2^{13231120023021} is an apocalyptic number.

It is an amenable number.

13231120023021 is a deficient number, since it is larger than the sum of its proper divisors (4410373341011).

13231120023021 is an equidigital number, since it uses as much as digits as its factorization.

13231120023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4410373341010.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 13231120023021 its reverse (12032002113231), we get a palindrome (25263122136252).

The spelling of 13231120023021 in words is "thirteen trillion, two hundred thirty-one billion, one hundred twenty million, twenty-three thousand, twenty-one".