12015012800 has 168 divisors, whose sum is σ = 34058010624. Its totient is φ = 4086512640.

The previous prime is 12015012787. The next prime is 12015012817. The reversal of 12015012800 is 821051021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1418177 + ... + 1426623.

Almost surely, 2^12015012800 is an apocalyptic number.

12015012800 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 12015012800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17029005312).

12015012800 is an abundant number, since it is smaller than the sum of its proper divisors (22042997824).

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

12015012800 is a wasteful number, since it uses less digits than its factorization.

12015012800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8603 (or 8588 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 12015012800 its reverse (821051021), we get a palindrome (12836063821).

The spelling of 12015012800 in words is "twelve billion, fifteen million, twelve thousand, eight hundred".