122025209 has 2 divisors, whose sum is σ = 122025210. Its totient is φ = 122025208.

The previous prime is 122025199. The next prime is 122025251. The reversal of 122025209 is 902520221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66373609 + 55651600 = 8147^2 + 7460^2 .

It is an emirp because it is prime and its reverse (902520221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122025209 - 2²⁰ = 120976633 is a prime.

It is not a weakly prime, because it can be changed into another prime (122025109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61012604 + 61012605.

It is an arithmetic number, because the mean of its divisors is an integer number (61012605).

Almost surely, 2^122025209 is an apocalyptic number.

It is an amenable number.

122025209 is a deficient number, since it is larger than the sum of its proper divisors (1).

122025209 is an equidigital number, since it uses as much as digits as its factorization.

122025209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 122025209 is about 11046.5021160547. The cubic root of 122025209 is about 496.0017248141.

The spelling of 122025209 in words is "one hundred twenty-two million, twenty-five thousand, two hundred nine".