12331213 has 2 divisors, whose sum is σ = 12331214. Its totient is φ = 12331212.

The previous prime is 12331183. The next prime is 12331219. The reversal of 12331213 is 31213321.

12331213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9498724 + 2832489 = 3082^2 + 1683^2 .

It is an emirp because it is prime and its reverse (31213321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12331213 - 2⁵ = 12331181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12331219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6165606 + 6165607.

It is an arithmetic number, because the mean of its divisors is an integer number (6165607).

Almost surely, 2^12331213 is an apocalyptic number.

It is an amenable number.

12331213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12331213 is an equidigital number, since it uses as much as digits as its factorization.

12331213 is an evil number, because the sum of its binary digits is even.

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

The square root of 12331213 is about 3511.5826916079. The cubic root of 12331213 is about 231.0301179473.

Adding to 12331213 its reverse (31213321), we get a palindrome (43544534).

It can be divided in two parts, 12331 and 213, that added together give a square (12544 = 112²).

The spelling of 12331213 in words is "twelve million, three hundred thirty-one thousand, two hundred thirteen".