202100022121 has 4 divisors (see below), whose sum is σ = 202905201744. Its totient is φ = 201294842500.

The previous prime is 202100022101. The next prime is 202100022133. The reversal of 202100022121 is 121220001202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202100022121 - 2²⁵ = 202066467689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202100022101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402589435 + ... + 402589936.

It is an arithmetic number, because the mean of its divisors is an integer number (50726300436).

Almost surely, 2^202100022121 is an apocalyptic number.

It is an amenable number.

202100022121 is a deficient number, since it is larger than the sum of its proper divisors (805179623).

202100022121 is an equidigital number, since it uses as much as digits as its factorization.

202100022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805179622.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202100022121 its reverse (121220001202), we get a palindrome (323320023323).

The spelling of 202100022121 in words is "two hundred two billion, one hundred million, twenty-two thousand, one hundred twenty-one".