12081040920 has 256 divisors, whose sum is σ = 44378611200. Its totient is φ = 2904491520.

The previous prime is 12081040919. The next prime is 12081040981. The reversal of 12081040920 is 2904018021.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 593715 + ... + 613725.

It is an arithmetic number, because the mean of its divisors is an integer number (173353950).

Almost surely, 2^12081040920 is an apocalyptic number.

12081040920 is a gapful number since it is divisible by the number (10) 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 12081040920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22189305600).

12081040920 is an abundant number, since it is smaller than the sum of its proper divisors (32297570280).

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

12081040920 is a wasteful number, since it uses less digits than its factorization.

12081040920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20087 (or 20077 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

Adding to 12081040920 its reverse (2904018021), we get a palindrome (14985058941).

The spelling of 12081040920 in words is "twelve billion, eighty-one million, forty thousand, nine hundred twenty".