20331313331021 has 48 divisors (see below), whose sum is σ = 26660679800832. Its totient is φ = 15148044769440.

The previous prime is 20331313331011. The next prime is 20331313331027. The reversal of 20331313331021 is 12013331313302.

It is not a de Polignac number, because 20331313331021 - 2²² = 20331309136717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331313331027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51681950 + ... + 52073856.

It is an arithmetic number, because the mean of its divisors is an integer number (555430829184).

Almost surely, 2^{20331313331021} is an apocalyptic number.

It is an amenable number.

20331313331021 is a deficient number, since it is larger than the sum of its proper divisors (6329366469811).

20331313331021 is a wasteful number, since it uses less digits than its factorization.

20331313331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394622 (or 394611 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 20331313331021 its reverse (12013331313302), we get a palindrome (32344644644323).

The spelling of 20331313331021 in words is "twenty trillion, three hundred thirty-one billion, three hundred thirteen million, three hundred thirty-one thousand, twenty-one".