122117209 has 2 divisors, whose sum is σ = 122117210. Its totient is φ = 122117208.

The previous prime is 122117159. The next prime is 122117287. The reversal of 122117209 is 902711221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87011584 + 35105625 = 9328^2 + 5925^2 .

It is a cyclic number.

It is not a de Polignac number, because 122117209 - 2¹³ = 122109017 is a prime.

It is a super-2 number, since 2×122117209² = 29825225467899362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122117309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61058604 + 61058605.

It is an arithmetic number, because the mean of its divisors is an integer number (61058605).

Almost surely, 2^122117209 is an apocalyptic number.

It is an amenable number.

122117209 is a deficient number, since it is larger than the sum of its proper divisors (1).

122117209 is an equidigital number, since it uses as much as digits as its factorization.

122117209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 122117209 is about 11050.6655455678. The cubic root of 122117209 is about 496.1263457724.

The spelling of 122117209 in words is "one hundred twenty-two million, one hundred seventeen thousand, two hundred nine".