202201112022121 has 4 divisors (see below), whose sum is σ = 202326780831700. Its totient is φ = 202075443212544.

The previous prime is 202201112022113. The next prime is 202201112022131. The reversal of 202201112022121 is 121220211102202.

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 94467922130521 + 107733189891600 = 9719461^2 + 10379460^2 .

It is a cyclic number.

It is not a de Polignac number, because 202201112022121 - 2³ = 202201112022113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202201112022131) 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, 62834402376 + ... + 62834405593.

It is an arithmetic number, because the mean of its divisors is an integer number (50581695207925).

Almost surely, 2^{202201112022121} is an apocalyptic number.

It is an amenable number.

202201112022121 is a deficient number, since it is larger than the sum of its proper divisors (125668809579).

202201112022121 is a wasteful number, since it uses less digits than its factorization.

202201112022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125668809578.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 202201112022121 its reverse (121220211102202), we get a palindrome (323421323124323).

The spelling of 202201112022121 in words is "two hundred two trillion, two hundred one billion, one hundred twelve million, twenty-two thousand, one hundred twenty-one".