122566343509 has 2 divisors, whose sum is σ = 122566343510. Its totient is φ = 122566343508.

The previous prime is 122566343443. The next prime is 122566343563. The reversal of 122566343509 is 905343665221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81426334609 + 41140008900 = 285353^2 + 202830^2 .

It is a cyclic number.

It is not a de Polignac number, because 122566343509 - 2¹⁷ = 122566212437 is a prime.

It is a super-2 number, since 2×122566343509² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122566343309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61283171754 + 61283171755.

It is an arithmetic number, because the mean of its divisors is an integer number (61283171755).

Almost surely, 2^122566343509 is an apocalyptic number.

It is an amenable number.

122566343509 is a deficient number, since it is larger than the sum of its proper divisors (1).

122566343509 is an equidigital number, since it uses as much as digits as its factorization.

122566343509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 122566343509 in words is "one hundred twenty-two billion, five hundred sixty-six million, three hundred forty-three thousand, five hundred nine".