202222202112121 has 4 divisors (see below), whose sum is σ = 202290313331700. Its totient is φ = 202154090892544.

The previous prime is 202222202112083. The next prime is 202222202112181. The reversal of 202222202112121 is 121211202222202.

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 40185596102521 + 162036606009600 = 6339211^2 + 12729360^2 .

It is a cyclic number.

It is not a de Polignac number, because 202222202112121 - 2²⁷ = 202222067894393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202222202112092 and 202222202112101.

It is not an unprimeable number, because it can be changed into a prime (202222202112181) 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, 34055605336 + ... + 34055611273.

It is an arithmetic number, because the mean of its divisors is an integer number (50572578332925).

Almost surely, 2^{202222202112121} is an apocalyptic number.

It is an amenable number.

202222202112121 is a deficient number, since it is larger than the sum of its proper divisors (68111219579).

202222202112121 is an equidigital number, since it uses as much as digits as its factorization.

202222202112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68111219578.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 202222202112121 its reverse (121211202222202), we get a palindrome (323433404334323).

The spelling of 202222202112121 in words is "two hundred two trillion, two hundred twenty-two billion, two hundred two million, one hundred twelve thousand, one hundred twenty-one".