122102209 has 16 divisors (see below), whose sum is σ = 129283920. Its totient is φ = 115153920.

The previous prime is 122102203. The next prime is 122102231. The reversal of 122102209 is 902201221.

It can be written as a sum of positive squares in 8 ways, for example, as 8573184 + 113529025 = 2928^2 + 10655^2 .

It is a cyclic number.

It is not a de Polignac number, because 122102209 - 2¹⁹ = 121577921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122102203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289819 + ... + 290239.

It is an arithmetic number, because the mean of its divisors is an integer number (8080245).

Almost surely, 2^122102209 is an apocalyptic number.

It is an amenable number.

122102209 is a deficient number, since it is larger than the sum of its proper divisors (7181711).

122102209 is a wasteful number, since it uses less digits than its factorization.

122102209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 122102209 is about 11049.9868325713. The cubic root of 122102209 is about 496.1060314095.

The spelling of 122102209 in words is "one hundred twenty-two million, one hundred two thousand, two hundred nine".