222112202121 has 6 divisors (see below), whose sum is σ = 320828736410. Its totient is φ = 148074801408.

The previous prime is 222112202047. The next prime is 222112202153. The reversal of 222112202121 is 121202211222.

It is a happy number.

222112202121 is a `hidden beast` number, since 22 + 211 + 220 + 212 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 159644198025 + 62468004096 = 399555^2 + 249936^2 .

It is not a de Polignac number, because 222112202121 - 2²¹ = 222110104969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222112202094 and 222112202103.

It is not an unprimeable number, because it can be changed into a prime (222112202321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12339566776 + ... + 12339566793.

Almost surely, 2^222112202121 is an apocalyptic number.

It is an amenable number.

222112202121 is a deficient number, since it is larger than the sum of its proper divisors (98716534289).

222112202121 is a wasteful number, since it uses less digits than its factorization.

222112202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24679133575 (or 24679133572 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222112202121 its reverse (121202211222), we get a palindrome (343314413343).

The spelling of 222112202121 in words is "two hundred twenty-two billion, one hundred twelve million, two hundred two thousand, one hundred twenty-one".