12021113112 has 32 divisors (see below), whose sum is σ = 30061250880. Its totient is φ = 4005908640.

The previous prime is 12021113107. The next prime is 12021113123. The reversal of 12021113112 is 21131112021.

It is a junction number, because it is equal to n+sod(n) for n = 12021113091 and 12021113100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18687 + ... + 156177.

It is an arithmetic number, because the mean of its divisors is an integer number (939414090).

Almost surely, 2^12021113112 is an apocalyptic number.

12021113112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12021113112 is an abundant number, since it is smaller than the sum of its proper divisors (18040137768).

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

12021113112 is a wasteful number, since it uses less digits than its factorization.

12021113112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141143 (or 141139 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12021113112 its reverse (21131112021), we get a palindrome (33152225133).

The spelling of 12021113112 in words is "twelve billion, twenty-one million, one hundred thirteen thousand, one hundred twelve".