222123120209 has 2 divisors, whose sum is σ = 222123120210. Its totient is φ = 222123120208.

The previous prime is 222123120139. The next prime is 222123120223. The reversal of 222123120209 is 902021321222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135306265600 + 86816854609 = 367840^2 + 294647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222123120209 is a prime.

It is not a weakly prime, because it can be changed into another prime (222123126209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111061560104 + 111061560105.

It is an arithmetic number, because the mean of its divisors is an integer number (111061560105).

Almost surely, 2^222123120209 is an apocalyptic number.

It is an amenable number.

222123120209 is a deficient number, since it is larger than the sum of its proper divisors (1).

222123120209 is an equidigital number, since it uses as much as digits as its factorization.

222123120209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 222123120209 in words is "two hundred twenty-two billion, one hundred twenty-three million, one hundred twenty thousand, two hundred nine".