222112212202121 has 8 divisors (see below), whose sum is σ = 222173045863080. Its totient is φ = 222051379557888.

The previous prime is 222112212202099. The next prime is 222112212202157. The reversal of 222112212202121 is 121202212211222.

It can be written as a sum of positive squares in 4 ways, for example, as 89714142780025 + 132398069422096 = 9471755^2 + 11506436^2 .

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 222112212202121 - 2³⁸ = 221837334295177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222112212202421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691741205 + ... + 692062221.

It is an arithmetic number, because the mean of its divisors is an integer number (27771630732885).

Almost surely, 2^{222112212202121} is an apocalyptic number.

It is an amenable number.

222112212202121 is a deficient number, since it is larger than the sum of its proper divisors (60833660959).

222112212202121 is a wasteful number, since it uses less digits than its factorization.

222112212202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508363.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 222112212202121 its reverse (121202212211222), we get a palindrome (343314424413343).

The spelling of 222112212202121 in words is "two hundred twenty-two trillion, one hundred twelve billion, two hundred twelve million, two hundred two thousand, one hundred twenty-one".