12015404120 has 64 divisors (see below), whose sum is σ = 27991656000. Its totient is φ = 4636323328.

The previous prime is 12015404059. The next prime is 12015404183. The reversal of 12015404120 is 2140451021.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 12015404092 and 12015404101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1526114 + ... + 1533966.

It is an arithmetic number, because the mean of its divisors is an integer number (437369625).

Almost surely, 2^12015404120 is an apocalyptic number.

12015404120 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 12015404120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13995828000).

12015404120 is an abundant number, since it is smaller than the sum of its proper divisors (15976251880).

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

12015404120 is a wasteful number, since it uses less digits than its factorization.

12015404120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9212 (or 9208 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 12015404120 its reverse (2140451021), we get a palindrome (14155855141).

The spelling of 12015404120 in words is "twelve billion, fifteen million, four hundred four thousand, one hundred twenty".