202100122022021 has 2 divisors, whose sum is σ = 202100122022022. Its totient is φ = 202100122022020.

The previous prime is 202100122022017. The next prime is 202100122022059. The reversal of 202100122022021 is 120220221001202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198607293696100 + 3492828325921 = 14092810^2 + 1868911^2 .

It is a cyclic number.

It is not a de Polignac number, because 202100122022021 - 2² = 202100122022017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202100122022221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101050061011010 + 101050061011011.

It is an arithmetic number, because the mean of its divisors is an integer number (101050061011011).

Almost surely, 2^{202100122022021} is an apocalyptic number.

It is an amenable number.

202100122022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202100122022021 is an equidigital number, since it uses as much as digits as its factorization.

202100122022021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202100122022021 its reverse (120220221001202), we get a palindrome (322320343023223).

The spelling of 202100122022021 in words is "two hundred two trillion, one hundred billion, one hundred twenty-two million, twenty-two thousand, twenty-one".