12015120305320 has 256 divisors, whose sum is σ = 30396361605120. Its totient is φ = 4272190869760.

The previous prime is 12015120305317. The next prime is 12015120305359. The reversal of 12015120305320 is 2350302151021.

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, 4471573017 + ... + 4471575703.

It is an arithmetic number, because the mean of its divisors is an integer number (118735787520).

Almost surely, 2^{12015120305320} is an apocalyptic number.

12015120305320 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 12015120305320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15198180802560).

12015120305320 is an abundant number, since it is smaller than the sum of its proper divisors (18381241299800).

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

12015120305320 is a wasteful number, since it uses less digits than its factorization.

12015120305320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4565 (or 4539 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 12015120305320 its reverse (2350302151021), we get a palindrome (14365422456341).

The spelling of 12015120305320 in words is "twelve trillion, fifteen billion, one hundred twenty million, three hundred five thousand, three hundred twenty".