12003123321 has 64 divisors (see below), whose sum is σ = 21245952000. Its totient is φ = 6548465088.

The previous prime is 12003123317. The next prime is 12003123373. The reversal of 12003123321 is 12332130021.

12003123321 is a `hidden beast` number, since 1 + 20 + 0 + 312 + 332 + 1 = 666.

It is not a de Polignac number, because 12003123321 - 2² = 12003123317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12003123294 and 12003123303.

It is not an unprimeable number, because it can be changed into a prime (12003123311) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2636355 + ... + 2640903.

It is an arithmetic number, because the mean of its divisors is an integer number (331968000).

Almost surely, 2^12003123321 is an apocalyptic number.

It is an amenable number.

12003123321 is a deficient number, since it is larger than the sum of its proper divisors (9242828679).

12003123321 is a wasteful number, since it uses less digits than its factorization.

12003123321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5195 (or 5189 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12003123321 its reverse (12332130021), we get a palindrome (24335253342).

The spelling of 12003123321 in words is "twelve billion, three million, one hundred twenty-three thousand, three hundred twenty-one".