20202021120021 has 48 divisors (see below), whose sum is σ = 29389794436800. Its totient is φ = 12337304818176.

The previous prime is 20202021120013. The next prime is 20202021120023. The reversal of 20202021120021 is 12002112020202.

It is not a de Polignac number, because 20202021120021 - 2³ = 20202021120013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202021120023) 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, 168300001 + ... + 168419993.

It is an arithmetic number, because the mean of its divisors is an integer number (612287384100).

Almost surely, 2^{20202021120021} is an apocalyptic number.

It is an amenable number.

20202021120021 is a deficient number, since it is larger than the sum of its proper divisors (9187773316779).

20202021120021 is a wasteful number, since it uses less digits than its factorization.

20202021120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122550 (or 122537 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20202021120021 its reverse (12002112020202), we get a palindrome (32204133140223).

The spelling of 20202021120021 in words is "twenty trillion, two hundred two billion, twenty-one million, one hundred twenty thousand, twenty-one".