202020202012021 has 32 divisors (see below), whose sum is σ = 218374264581120. Its totient is φ = 186304805568000.

The previous prime is 202020202011989. The next prime is 202020202012061. The reversal of 202020202012021 is 120210202020202.

It is a cyclic number.

It is not a de Polignac number, because 202020202012021 - 2⁵ = 202020202011989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202020202011986 and 202020202012004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020202012061) 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, 268508860 + ... + 269260186.

It is an arithmetic number, because the mean of its divisors is an integer number (6824195768160).

Almost surely, 2^{202020202012021} is an apocalyptic number.

It is an amenable number.

202020202012021 is a deficient number, since it is larger than the sum of its proper divisors (16354062569099).

202020202012021 is a wasteful number, since it uses less digits than its factorization.

202020202012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753805.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 202020202012021 its reverse (120210202020202), we get a palindrome (322230404032223).

The spelling of 202020202012021 in words is "two hundred two trillion, twenty billion, two hundred two million, twelve thousand, twenty-one".