122939561522 has 18 divisors (see below), whose sum is σ = 194640842493. Its totient is φ = 58230066384.

The previous prime is 122939561491. The next prime is 122939561527. The reversal of 122939561522 is 225165939221.

It can be written as a sum of positive squares in 2 ways, for example, as 122339752441 + 599809081 = 349771^2 + 24491^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=247931.

It is a super-2 number, since 2×122939561522² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122939561527) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9414854 + ... + 9427902.

Almost surely, 2^122939561522 is an apocalyptic number.

122939561522 is a deficient number, since it is larger than the sum of its proper divisors (71701280971).

122939561522 is an frugal number, since it uses more digits than its factorization.

122939561522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26138 (or 13070 counting only the distinct ones).

The product of its digits is 583200, while the sum is 47.

The spelling of 122939561522 in words is "one hundred twenty-two billion, nine hundred thirty-nine million, five hundred sixty-one thousand, five hundred twenty-two".