202020120110021 has 2 divisors, whose sum is σ = 202020120110022. Its totient is φ = 202020120110020.

The previous prime is 202020120109979. The next prime is 202020120110027. The reversal of 202020120110021 is 120011021020202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108905629437796 + 93114490672225 = 10435786^2 + 9649585^2 .

It is a cyclic number.

It is not a de Polignac number, because 202020120110021 - 2²⁶ = 202020053001157 is a prime.

It is a super-2 number, since 2×202020120110021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202020120109978 and 202020120110005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202020120110027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101010060055010 + 101010060055011.

It is an arithmetic number, because the mean of its divisors is an integer number (101010060055011).

Almost surely, 2^{202020120110021} is an apocalyptic number.

It is an amenable number.

202020120110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202020120110021 is an equidigital number, since it uses as much as digits as its factorization.

202020120110021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202020120110021 its reverse (120011021020202), we get a palindrome (322031141130223).

The spelling of 202020120110021 in words is "two hundred two trillion, twenty billion, one hundred twenty million, one hundred ten thousand, twenty-one".