222111101111209 has 2 divisors, whose sum is σ = 222111101111210. Its totient is φ = 222111101111208.

The previous prime is 222111101111177. The next prime is 222111101111293. The reversal of 222111101111209 is 902111101111222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138647163171609 + 83463937939600 = 11774853^2 + 9135860^2 .

It is a cyclic number.

It is not a de Polignac number, because 222111101111209 - 2⁵ = 222111101111177 is a prime.

It is not a weakly prime, because it can be changed into another prime (222111101111309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111055550555604 + 111055550555605.

It is an arithmetic number, because the mean of its divisors is an integer number (111055550555605).

Almost surely, 2^{222111101111209} is an apocalyptic number.

It is an amenable number.

222111101111209 is a deficient number, since it is larger than the sum of its proper divisors (1).

222111101111209 is an equidigital number, since it uses as much as digits as its factorization.

222111101111209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 25.

The spelling of 222111101111209 in words is "two hundred twenty-two trillion, one hundred eleven billion, one hundred one million, one hundred eleven thousand, two hundred nine".