122220209 has 2 divisors, whose sum is σ = 122220210. Its totient is φ = 122220208.

The previous prime is 122220199. The next prime is 122220223. The reversal of 122220209 is 902022221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62853184 + 59367025 = 7928^2 + 7705^2 .

It is a cyclic number.

It is not a de Polignac number, because 122220209 - 2⁴ = 122220193 is a prime.

It is not a weakly prime, because it can be changed into another prime (122220269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110104 + 61110105.

It is an arithmetic number, because the mean of its divisors is an integer number (61110105).

Almost surely, 2^122220209 is an apocalyptic number.

It is an amenable number.

122220209 is a deficient number, since it is larger than the sum of its proper divisors (1).

122220209 is an equidigital number, since it uses as much as digits as its factorization.

122220209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 122220209 is about 11055.3249160755. The cubic root of 122220209 is about 496.2657928214.

The spelling of 122220209 in words is "one hundred twenty-two million, two hundred twenty thousand, two hundred nine".