12001015320 has 96 divisors (see below), whose sum is σ = 41881114800. Its totient is φ = 2743087872.

The previous prime is 12001015291. The next prime is 12001015339. The reversal of 12001015320 is 2351010021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12001015320.

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, 1014615 + ... + 1026374.

Almost surely, 2^12001015320 is an apocalyptic number.

12001015320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001015320 is an abundant number, since it is smaller than the sum of its proper divisors (29880099480).

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

12001015320 is a wasteful number, since it uses less digits than its factorization.

12001015320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041017 (or 2041006 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

Adding to 12001015320 its reverse (2351010021), we get a palindrome (14352025341).

The spelling of 12001015320 in words is "twelve billion, one million, fifteen thousand, three hundred twenty".