12012199980 has 72 divisors (see below), whose sum is σ = 36969801456. Its totient is φ = 2912046720.

The previous prime is 12012199933. The next prime is 12012200029. The reversal of 12012199980 is 8999121021.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 820027 + ... + 834546.

Almost surely, 2^12012199980 is an apocalyptic number.

12012199980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012199980 is an abundant number, since it is smaller than the sum of its proper divisors (24957601476).

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

12012199980 is a wasteful number, since it uses less digits than its factorization.

12012199980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654607 (or 1654594 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 42.

The spelling of 12012199980 in words is "twelve billion, twelve million, one hundred ninety-nine thousand, nine hundred eighty".