122510209 has 2 divisors, whose sum is σ = 122510210. Its totient is φ = 122510208.

The previous prime is 122510183. The next prime is 122510231. The reversal of 122510209 is 902015221.

It is an a-pointer prime, because the next prime (122510231) can be obtained adding 122510209 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65658609 + 56851600 = 8103^2 + 7540^2 .

It is a cyclic number.

It is not a de Polignac number, because 122510209 - 2¹⁹ = 121985921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122510209.

It is not a weakly prime, because it can be changed into another prime (122510249) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61255104 + 61255105.

It is an arithmetic number, because the mean of its divisors is an integer number (61255105).

Almost surely, 2^122510209 is an apocalyptic number.

It is an amenable number.

122510209 is a deficient number, since it is larger than the sum of its proper divisors (1).

122510209 is an equidigital number, since it uses as much as digits as its factorization.

122510209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 122510209 is about 11068.4329965899. The cubic root of 122510209 is about 496.6579903794.

The spelling of 122510209 in words is "one hundred twenty-two million, five hundred ten thousand, two hundred nine".