222212122209 has 24 divisors (see below), whose sum is σ = 400174212672. Its totient is φ = 115434868320.

The previous prime is 222212122199. The next prime is 222212122243. The reversal of 222212122209 is 902221212222.

222212122209 is a `hidden beast` number, since 2 + 2 + 221 + 212 + 220 + 9 = 666.

It is not a de Polignac number, because 222212122209 - 2⁸ = 222212121953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222212132209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160325514 + ... + 160326899.

It is an arithmetic number, because the mean of its divisors is an integer number (16673925528).

Almost surely, 2^222212122209 is an apocalyptic number.

It is an amenable number.

222212122209 is a deficient number, since it is larger than the sum of its proper divisors (177962090463).

222212122209 is a wasteful number, since it uses less digits than its factorization.

222212122209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320652437 (or 320652434 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 222212122209 in words is "two hundred twenty-two billion, two hundred twelve million, one hundred twenty-two thousand, two hundred nine".