12111642612 has 60 divisors (see below), whose sum is σ = 31706394720. Its totient is φ = 4031582544.

The previous prime is 12111642607. The next prime is 12111642623. The reversal of 12111642612 is 21624611121.

12111642612 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 1 + 6 + 42 + 612 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 209839 + ... + 261257.

It is an arithmetic number, because the mean of its divisors is an integer number (528439912).

Almost surely, 2^12111642612 is an apocalyptic number.

12111642612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12111642612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15853197360).

12111642612 is an abundant number, since it is smaller than the sum of its proper divisors (19594752108).

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

12111642612 is a wasteful number, since it uses less digits than its factorization.

12111642612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52162 (or 52151 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The spelling of 12111642612 in words is "twelve billion, one hundred eleven million, six hundred forty-two thousand, six hundred twelve".