202202100112121 has 4 divisors (see below), whose sum is σ = 202358967530100. Its totient is φ = 202045232694144.

The previous prime is 202202100112099. The next prime is 202202100112141. The reversal of 202202100112121 is 121211001202202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93176760201721 + 109025339910400 = 9652811^2 + 10441520^2 .

It is a cyclic number.

It is not a de Polignac number, because 202202100112121 - 2¹⁸ = 202202099849977 is a prime.

It is a super-2 number, since 2×202202100112121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202202100112121.

It is not an unprimeable number, because it can be changed into a prime (202202100112141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78433707056 + ... + 78433709633.

It is an arithmetic number, because the mean of its divisors is an integer number (50589741882525).

Almost surely, 2^{202202100112121} is an apocalyptic number.

It is an amenable number.

202202100112121 is a deficient number, since it is larger than the sum of its proper divisors (156867417979).

202202100112121 is a wasteful number, since it uses less digits than its factorization.

202202100112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156867417978.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 202202100112121 its reverse (121211001202202), we get a palindrome (323413101314323).

The spelling of 202202100112121 in words is "two hundred two trillion, two hundred two billion, one hundred million, one hundred twelve thousand, one hundred twenty-one".