202000022121021 has 32 divisors (see below), whose sum is σ = 291811047327360. Its totient is φ = 123796476217344.

The previous prime is 202000022121019. The next prime is 202000022121043. The reversal of 202000022121021 is 120121220000202.

It is not a de Polignac number, because 202000022121021 - 2¹ = 202000022121019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202000022121221) 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, 305577985 + ... + 306238313.

It is an arithmetic number, because the mean of its divisors is an integer number (9119095228980).

Almost surely, 2^{202000022121021} is an apocalyptic number.

It is an amenable number.

202000022121021 is a deficient number, since it is larger than the sum of its proper divisors (89811025206339).

202000022121021 is a wasteful number, since it uses less digits than its factorization.

202000022121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799885.

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

Adding to 202000022121021 its reverse (120121220000202), we get a palindrome (322121242121223).

The spelling of 202000022121021 in words is "two hundred two trillion, twenty-two million, one hundred twenty-one thousand, twenty-one".