12421143312 has 80 divisors (see below), whose sum is σ = 33325902720. Its totient is φ = 3983164416.

The previous prime is 12421143299. The next prime is 12421143337. The reversal of 12421143312 is 21334112421.

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

It is a nude number because it is divisible by every one of its digits.

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, 118773 + ... + 197355.

It is an arithmetic number, because the mean of its divisors is an integer number (416573784).

Almost surely, 2^12421143312 is an apocalyptic number.

12421143312 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 12421143312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16662951360).

12421143312 is an abundant number, since it is smaller than the sum of its proper divisors (20904759408).

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

12421143312 is a wasteful number, since it uses less digits than its factorization.

12421143312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78720 (or 78714 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 12421143312 its reverse (21334112421), we get a palindrome (33755255733).

The spelling of 12421143312 in words is "twelve billion, four hundred twenty-one million, one hundred forty-three thousand, three hundred twelve".