12185519112 has 48 divisors (see below), whose sum is σ = 35541100140. Its totient is φ = 3749390208.

The previous prime is 12185519107. The next prime is 12185519141. The reversal of 12185519112 is 21191558121.

It is a happy number.

12185519112 is a `hidden beast` number, since 1 + 2 + 1 + 8 + 551 + 91 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11317980996 + 867538116 = 106386^2 + 29454^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6508423 + ... + 6510294.

Almost surely, 2^12185519112 is an apocalyptic number.

12185519112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12185519112 is an abundant number, since it is smaller than the sum of its proper divisors (23355581028).

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

12185519112 is a wasteful number, since it uses less digits than its factorization.

12185519112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13018742 (or 13018735 counting only the distinct ones).

The product of its digits is 7200, while the sum is 36.

The spelling of 12185519112 in words is "twelve billion, one hundred eighty-five million, five hundred nineteen thousand, one hundred twelve".