12031330213 has 4 divisors (see below), whose sum is σ = 13750091680. Its totient is φ = 10312568748.

The previous prime is 12031330177. The next prime is 12031330217. The reversal of 12031330213 is 31203313021.

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 a de Polignac number, because none of the positive numbers 2^k-12031330213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031330217) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 859380723 + ... + 859380736.

It is an arithmetic number, because the mean of its divisors is an integer number (3437522920).

Almost surely, 2^12031330213 is an apocalyptic number.

It is an amenable number.

12031330213 is a deficient number, since it is larger than the sum of its proper divisors (1718761467).

12031330213 is an equidigital number, since it uses as much as digits as its factorization.

12031330213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718761466.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 12031330213 its reverse (31203313021), we get a palindrome (43234643234).

The spelling of 12031330213 in words is "twelve billion, thirty-one million, three hundred thirty thousand, two hundred thirteen".