12105903912 has 64 divisors (see below), whose sum is σ = 30784320000. Its totient is φ = 3966519744.

The previous prime is 12105903853. The next prime is 12105903913. The reversal of 12105903912 is 21930950121.

It is not an unprimeable number, because it can be changed into a prime (12105903913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381139 + ... + 411677.

It is an arithmetic number, because the mean of its divisors is an integer number (481005000).

Almost surely, 2^12105903912 is an apocalyptic number.

12105903912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12105903912 is an abundant number, since it is smaller than the sum of its proper divisors (18678416088).

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

12105903912 is a wasteful number, since it uses less digits than its factorization.

12105903912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30830 (or 30826 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 33.

The spelling of 12105903912 in words is "twelve billion, one hundred five million, nine hundred three thousand, nine hundred twelve".