11912997912 has 16 divisors (see below), whose sum is σ = 29782494840. Its totient is φ = 3970999296.

The previous prime is 11912997881. The next prime is 11912997949. The reversal of 11912997912 is 21979921911.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 248187433 + ... + 248187480.

Almost surely, 2^11912997912 is an apocalyptic number.

11912997912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11912997912 is an abundant number, since it is smaller than the sum of its proper divisors (17869496928).

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

11912997912 is a wasteful number, since it uses less digits than its factorization.

11912997912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496374922 (or 496374918 counting only the distinct ones).

The product of its digits is 183708, while the sum is 51.

The spelling of 11912997912 in words is "eleven billion, nine hundred twelve million, nine hundred ninety-seven thousand, nine hundred twelve".