12021425112 has 64 divisors (see below), whose sum is σ = 30690633600. Its totient is φ = 3922767360.

The previous prime is 12021425107. The next prime is 12021425189. The reversal of 12021425112 is 21152412021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323643 + ... + 358869.

It is an arithmetic number, because the mean of its divisors is an integer number (479541150).

Almost surely, 2^12021425112 is an apocalyptic number.

12021425112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12021425112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15345316800).

12021425112 is an abundant number, since it is smaller than the sum of its proper divisors (18669208488).

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

12021425112 is a wasteful number, since it uses less digits than its factorization.

12021425112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35536 (or 35532 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 12021425112 its reverse (21152412021), we get a palindrome (33173837133).

The spelling of 12021425112 in words is "twelve billion, twenty-one million, four hundred twenty-five thousand, one hundred twelve".