202212112121 has 4 divisors (see below), whose sum is σ = 202300765044. Its totient is φ = 202123459200.

The previous prime is 202212112111. The next prime is 202212112181. The reversal of 202212112121 is 121211212202.

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 155551360000 + 46660752121 = 394400^2 + 216011^2 .

It is a cyclic number.

It is not a de Polignac number, because 202212112121 - 2²⁶ = 202145003257 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 202212112121.

It is not an unprimeable number, because it can be changed into a prime (202212112111) 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, 44323040 + ... + 44327601.

It is an arithmetic number, because the mean of its divisors is an integer number (50575191261).

Almost surely, 2^202212112121 is an apocalyptic number.

It is an amenable number.

202212112121 is a deficient number, since it is larger than the sum of its proper divisors (88652923).

202212112121 is an equidigital number, since it uses as much as digits as its factorization.

202212112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88652922.

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

Adding to 202212112121 its reverse (121211212202), we get a palindrome (323423324323).

The spelling of 202212112121 in words is "two hundred two billion, two hundred twelve million, one hundred twelve thousand, one hundred twenty-one".