20331112021 has 32 divisors (see below), whose sum is σ = 23346610560. Its totient is φ = 17541427200.

The previous prime is 20331112019. The next prime is 20331112057. The reversal of 20331112021 is 12021113302.

It is not a de Polignac number, because 20331112021 - 2¹ = 20331112019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20331111986 and 20331112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331112421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2577135 + ... + 2585011.

It is an arithmetic number, because the mean of its divisors is an integer number (729581580).

Almost surely, 2^20331112021 is an apocalyptic number.

It is an amenable number.

20331112021 is a deficient number, since it is larger than the sum of its proper divisors (3015498539).

20331112021 is a wasteful number, since it uses less digits than its factorization.

20331112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8085.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20331112021 its reverse (12021113302), we get a palindrome (32352225323).

The spelling of 20331112021 in words is "twenty billion, three hundred thirty-one million, one hundred twelve thousand, twenty-one".