12111972840 has 96 divisors (see below), whose sum is σ = 42942463200. Its totient is φ = 2936234880.

The previous prime is 12111972839. The next prime is 12111972863. The reversal of 12111972840 is 4827911121.

12111972840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 12111972795 and 12111972804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1525330 + ... + 1533249.

It is an arithmetic number, because the mean of its divisors is an integer number (447317325).

Almost surely, 2^12111972840 is an apocalyptic number.

12111972840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111972840 is an abundant number, since it is smaller than the sum of its proper divisors (30830490360).

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

12111972840 is a wasteful number, since it uses less digits than its factorization.

12111972840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058607 (or 3058600 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The spelling of 12111972840 in words is "twelve billion, one hundred eleven million, nine hundred seventy-two thousand, eight hundred forty".