12001918312 has 16 divisors (see below), whose sum is σ = 22512314340. Its totient is φ = 5998634496.

The previous prime is 12001918301. The next prime is 12001918339. The reversal of 12001918312 is 21381910021.

It can be written as a sum of positive squares in 2 ways, for example, as 10925684676 + 1076233636 = 104526^2 + 32806^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268543 + ... + 310030.

Almost surely, 2^12001918312 is an apocalyptic number.

It is an amenable number.

12001918312 is a deficient number, since it is larger than the sum of its proper divisors (10510396028).

12001918312 is a wasteful number, since it uses less digits than its factorization.

12001918312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581172 (or 581168 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 12001918312 in words is "twelve billion, one million, nine hundred eighteen thousand, three hundred twelve".