12123003213 has 8 divisors (see below), whose sum is σ = 17960004800. Its totient is φ = 8082002124.

The previous prime is 12123003203. The next prime is 12123003227. The reversal of 12123003213 is 31230032121.

12123003213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12123003213 - 2⁹ = 12123002701 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 (12123003203) 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 7 ways as a sum of consecutive naturals, for example, 224500033 + ... + 224500086.

It is an arithmetic number, because the mean of its divisors is an integer number (2245000600).

Almost surely, 2^12123003213 is an apocalyptic number.

It is an amenable number.

12123003213 is a deficient number, since it is larger than the sum of its proper divisors (5837001587).

12123003213 is an equidigital number, since it uses as much as digits as its factorization.

12123003213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449000128 (or 449000122 counting only the distinct ones).

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

Adding to 12123003213 its reverse (31230032121), we get a palindrome (43353035334).

The spelling of 12123003213 in words is "twelve billion, one hundred twenty-three million, three thousand, two hundred thirteen".