222012202121 has 8 divisors (see below), whose sum is σ = 223173361224. Its totient is φ = 220851388800.

The previous prime is 222012202057. The next prime is 222012202127. The reversal of 222012202121 is 121202210222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24155376400 + 197856825721 = 155420^2 + 444811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222012202121 - 2⁶ = 222012202057 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 222012202121.

It is not an unprimeable number, because it can be changed into a prime (222012202127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1255271 + ... + 1421171.

It is an arithmetic number, because the mean of its divisors is an integer number (27896670153).

Almost surely, 2^222012202121 is an apocalyptic number.

It is an amenable number.

222012202121 is a deficient number, since it is larger than the sum of its proper divisors (1161159103).

222012202121 is a wasteful number, since it uses less digits than its factorization.

222012202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172891.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222012202121 its reverse (121202210222), we get a palindrome (343214412343).

The spelling of 222012202121 in words is "two hundred twenty-two billion, twelve million, two hundred two thousand, one hundred twenty-one".