122566109 has 2 divisors, whose sum is σ = 122566110. Its totient is φ = 122566108.

The previous prime is 122566063. The next prime is 122566117. The reversal of 122566109 is 901665221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84088900 + 38477209 = 9170^2 + 6203^2 .

It is an emirp because it is prime and its reverse (901665221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122566109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122566009) 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, 61283054 + 61283055.

It is an arithmetic number, because the mean of its divisors is an integer number (61283055).

Almost surely, 2^122566109 is an apocalyptic number.

It is an amenable number.

122566109 is a deficient number, since it is larger than the sum of its proper divisors (1).

122566109 is an equidigital number, since it uses as much as digits as its factorization.

122566109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 122566109 is about 11070.9579079680. The cubic root of 122566109 is about 496.7335186702.

The spelling of 122566109 in words is "one hundred twenty-two million, five hundred sixty-six thousand, one hundred nine".