122125915566 has 16 divisors (see below), whose sum is σ = 271390923600. Its totient is φ = 40708638504.

The previous prime is 122125915537. The next prime is 122125915567. The reversal of 122125915566 is 665519521221.

122125915566 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 2 + 5 + 91 + 556 + 6 = 666.

It is a super-2 number, since 2×122125915566² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122125915567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1130795461 + ... + 1130795568.

It is an arithmetic number, because the mean of its divisors is an integer number (16961932725).

Almost surely, 2^122125915566 is an apocalyptic number.

122125915566 is an abundant number, since it is smaller than the sum of its proper divisors (149265008034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122125915566 is a wasteful number, since it uses less digits than its factorization.

122125915566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261591040 (or 2261591034 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The spelling of 122125915566 in words is "one hundred twenty-two billion, one hundred twenty-five million, nine hundred fifteen thousand, five hundred sixty-six".