11997115612 has 6 divisors (see below), whose sum is σ = 20994952328. Its totient is φ = 5998557804.

The previous prime is 11997115573. The next prime is 11997115631. The reversal of 11997115612 is 21651179911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1499639448 + ... + 1499639455.

Almost surely, 2^11997115612 is an apocalyptic number.

It is an amenable number.

11997115612 is a deficient number, since it is larger than the sum of its proper divisors (8997836716).

11997115612 is a wasteful number, since it uses less digits than its factorization.

11997115612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999278907 (or 2999278905 counting only the distinct ones).

The product of its digits is 34020, while the sum is 43.

The spelling of 11997115612 in words is "eleven billion, nine hundred ninety-seven million, one hundred fifteen thousand, six hundred twelve".