12003221320 has 32 divisors (see below), whose sum is σ = 27449995320. Its totient is φ = 4722577920.

The previous prime is 12003221309. The next prime is 12003221339. The reversal of 12003221320 is 2312230021.

It can be written as a sum of positive squares in 4 ways, for example, as 7599306276 + 4403915044 = 87174^2 + 66362^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12003221294 and 12003221303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2457237 + ... + 2462116.

Almost surely, 2^12003221320 is an apocalyptic number.

12003221320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12003221320 is an abundant number, since it is smaller than the sum of its proper divisors (15446774000).

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

12003221320 is a wasteful number, since it uses less digits than its factorization.

12003221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4919425 (or 4919421 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 12003221320 its reverse (2312230021), we get a palindrome (14315451341).

The spelling of 12003221320 in words is "twelve billion, three million, two hundred twenty-one thousand, three hundred twenty".