12021012112 has 40 divisors (see below), whose sum is σ = 24932109600. Its totient is φ = 5597644032.

The previous prime is 12021012109. The next prime is 12021012149. The reversal of 12021012112 is 21121012021.

It is a junction number, because it is equal to n+sod(n) for n = 12021012092 and 12021012101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317173 + ... + 353044.

It is an arithmetic number, because the mean of its divisors is an integer number (623302740).

Almost surely, 2^12021012112 is an apocalyptic number.

It is an amenable number.

12021012112 is an abundant number, since it is smaller than the sum of its proper divisors (12911097488).

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

12021012112 is a wasteful number, since it uses less digits than its factorization.

12021012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670303 (or 670297 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12021012112 its reverse (21121012021), we get a palindrome (33142024133).

Subtracting 12021012112 from its reverse (21121012021), we obtain a palindrome (9099999909).

The spelling of 12021012112 in words is "twelve billion, twenty-one million, twelve thousand, one hundred twelve".