20331120313021 has 16 divisors (see below), whose sum is σ = 23680902199680. Its totient is φ = 17095838356800.

The previous prime is 20331120313003. The next prime is 20331120313057. The reversal of 20331120313021 is 12031302113302.

It is not a de Polignac number, because 20331120313021 - 2²³ = 20331111924413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20331120312983 and 20331120313001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331120313061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131835271 + ... + 131989396.

It is an arithmetic number, because the mean of its divisors is an integer number (1480056387480).

Almost surely, 2^{20331120313021} is an apocalyptic number.

It is an amenable number.

20331120313021 is a deficient number, since it is larger than the sum of its proper divisors (3349781886659).

20331120313021 is a wasteful number, since it uses less digits than its factorization.

20331120313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263824884.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20331120313021 its reverse (12031302113302), we get a palindrome (32362422426323).

The spelling of 20331120313021 in words is "twenty trillion, three hundred thirty-one billion, one hundred twenty million, three hundred thirteen thousand, twenty-one".