12011330320 has 80 divisors (see below), whose sum is σ = 32068572480. Its totient is φ = 4137868800.

The previous prime is 12011330291. The next prime is 12011330323. The reversal of 12011330320 is 2303311021.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 12011330294 and 12011330303.

It is not an unprimeable number, because it can be changed into a prime (12011330323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342471 + ... + 375910.

It is an arithmetic number, because the mean of its divisors is an integer number (400857156).

Almost surely, 2^12011330320 is an apocalyptic number.

12011330320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011330320 is an abundant number, since it is smaller than the sum of its proper divisors (20057242160).

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

12011330320 is a wasteful number, since it uses less digits than its factorization.

12011330320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718424 (or 718418 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 12011330320 its reverse (2303311021), we get a palindrome (14314641341).

The spelling of 12011330320 in words is "twelve billion, eleven million, three hundred thirty thousand, three hundred twenty".