12122011992 has 16 divisors (see below), whose sum is σ = 30305030040. Its totient is φ = 4040670656.

The previous prime is 12122011903. The next prime is 12122011997. The reversal of 12122011992 is 29911022121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122011997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252541893 + ... + 252541940.

Almost surely, 2^12122011992 is an apocalyptic number.

12122011992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12122011992 is an abundant number, since it is smaller than the sum of its proper divisors (18183018048).

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

12122011992 is a wasteful number, since it uses less digits than its factorization.

12122011992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505083842 (or 505083838 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 12122011992 in words is "twelve billion, one hundred twenty-two million, eleven thousand, nine hundred ninety-two".