12111593522 has 18 divisors (see below), whose sum is σ = 21135395997. Its totient is φ = 5190216024.

The previous prime is 12111593519. The next prime is 12111593539. The reversal of 12111593522 is 22539511121.

It can be written as a sum of positive squares in 2 ways, for example, as 9834490561 + 2277102961 = 99169^2 + 47719^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=77819.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1083908 + ... + 1095024.

Almost surely, 2^12111593522 is an apocalyptic number.

12111593522 is a deficient number, since it is larger than the sum of its proper divisors (9023802475).

12111593522 is an frugal number, since it uses more digits than its factorization.

12111593522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22250 (or 11126 counting only the distinct ones).

The product of its digits is 5400, while the sum is 32.

Multiplying 12111593522 by its sum of digits (32), we get a square (387570992704 = 622552²).

The spelling of 12111593522 in words is "twelve billion, one hundred eleven million, five hundred ninety-three thousand, five hundred twenty-two".