122222209 has 2 divisors, whose sum is σ = 122222210. Its totient is φ = 122222208.

The previous prime is 122222201. The next prime is 122222239. The reversal of 122222209 is 902222221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104346225 + 17875984 = 10215^2 + 4228^2 .

It is a cyclic number.

It is not a de Polignac number, because 122222209 - 2³ = 122222201 is a prime.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 122222209.

It is not a weakly prime, because it can be changed into another prime (122222201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61111104 + 61111105.

It is an arithmetic number, because the mean of its divisors is an integer number (61111105).

Almost surely, 2^122222209 is an apocalyptic number.

It is an amenable number.

122222209 is a deficient number, since it is larger than the sum of its proper divisors (1).

122222209 is an equidigital number, since it uses as much as digits as its factorization.

122222209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 122222209 is about 11055.4153698538. The cubic root of 122222209 is about 496.2684997555.

The spelling of 122222209 in words is "one hundred twenty-two million, two hundred twenty-two thousand, two hundred nine".