12421532112 has 160 divisors (see below), whose sum is σ = 36961920000. Its totient is φ = 3555025920.

The previous prime is 12421532111. The next prime is 12421532117. The reversal of 12421532112 is 21123512421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421532111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3599764 + ... + 3603212.

It is an arithmetic number, because the mean of its divisors is an integer number (231012000).

Almost surely, 2^12421532112 is an apocalyptic number.

12421532112 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 12421532112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18480960000).

12421532112 is an abundant number, since it is smaller than the sum of its proper divisors (24540387888).

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

12421532112 is a wasteful number, since it uses less digits than its factorization.

12421532112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849 (or 3843 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The spelling of 12421532112 in words is "twelve billion, four hundred twenty-one million, five hundred thirty-two thousand, one hundred twelve".