202101200112221 has 4 divisors (see below), whose sum is σ = 202147670845500. Its totient is φ = 202054729378944.

The previous prime is 202101200112157. The next prime is 202101200112247. The reversal of 202101200112221 is 122211002101202.

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 41771157489721 + 160330042622500 = 6463061^2 + 12662150^2 .

It is a cyclic number.

It is not a de Polignac number, because 202101200112221 - 2⁶ = 202101200112157 is a prime.

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 202101200112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202101200117221) 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, 23235360116 + ... + 23235368813.

It is an arithmetic number, because the mean of its divisors is an integer number (50536917711375).

Almost surely, 2^{202101200112221} is an apocalyptic number.

It is an amenable number.

202101200112221 is a deficient number, since it is larger than the sum of its proper divisors (46470733279).

202101200112221 is an equidigital number, since it uses as much as digits as its factorization.

202101200112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46470733278.

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

Adding to 202101200112221 its reverse (122211002101202), we get a palindrome (324312202213423).

The spelling of 202101200112221 in words is "two hundred two trillion, one hundred one billion, two hundred million, one hundred twelve thousand, two hundred twenty-one".