12031030321 has 4 divisors (see below), whose sum is σ = 12081369600. Its totient is φ = 11980691044.

The previous prime is 12031030307. The next prime is 12031030331. The reversal of 12031030321 is 12303013021.

12031030321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12031030321 - 2⁵ = 12031030289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12031030295 and 12031030304.

It is not an unprimeable number, because it can be changed into a prime (12031030331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25169281 + ... + 25169758.

It is an arithmetic number, because the mean of its divisors is an integer number (3020342400).

Almost surely, 2^12031030321 is an apocalyptic number.

It is an amenable number.

12031030321 is a deficient number, since it is larger than the sum of its proper divisors (50339279).

12031030321 is an equidigital number, since it uses as much as digits as its factorization.

12031030321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50339278.

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

Adding to 12031030321 its reverse (12303013021), we get a palindrome (24334043342).

The spelling of 12031030321 in words is "twelve billion, thirty-one million, thirty thousand, three hundred twenty-one".