122204209 has 4 divisors (see below), whose sum is σ = 123577380. Its totient is φ = 120831040.

The previous prime is 122204191. The next prime is 122204227. The reversal of 122204209 is 902402221.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (122204191) and next prime (122204227).

It can be written as a sum of positive squares in 2 ways, for example, as 41563809 + 80640400 = 6447^2 + 8980^2 .

It is a cyclic number.

It is not a de Polignac number, because 122204209 - 2¹⁷ = 122073137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122204209.

It is not an unprimeable number, because it can be changed into a prime (122204239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686452 + ... + 686629.

It is an arithmetic number, because the mean of its divisors is an integer number (30894345).

Almost surely, 2^122204209 is an apocalyptic number.

It is an amenable number.

122204209 is a deficient number, since it is larger than the sum of its proper divisors (1373171).

122204209 is an equidigital number, since it uses as much as digits as its factorization.

122204209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373170.

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

The square root of 122204209 is about 11054.6012592042. The cubic root of 122204209 is about 496.2441362850.

The spelling of 122204209 in words is "one hundred twenty-two million, two hundred four thousand, two hundred nine".