12001123320 has 32 divisors (see below), whose sum is σ = 36003370320. Its totient is φ = 3200299520.

The previous prime is 12001123291. The next prime is 12001123339. The reversal of 12001123320 is 2332110021.

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 12001123320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50004561 + ... + 50004800.

Almost surely, 2^12001123320 is an apocalyptic number.

12001123320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001123320 is an abundant number, since it is smaller than the sum of its proper divisors (24002247000).

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

12001123320 is a wasteful number, since it uses less digits than its factorization.

12001123320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100009375 (or 100009371 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12001123320 its reverse (2332110021), we get a palindrome (14333233341).

The spelling of 12001123320 in words is "twelve billion, one million, one hundred twenty-three thousand, three hundred twenty".