12188213 has 2 divisors, whose sum is σ = 12188214. Its totient is φ = 12188212.

The previous prime is 12188191. The next prime is 12188219. The reversal of 12188213 is 31288121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6461764 + 5726449 = 2542^2 + 2393^2 .

It is an emirp because it is prime and its reverse (31288121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12188213 - 2¹⁴ = 12171829 is a prime.

It is a super-3 number, since 3×12188213³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12188219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6094106 + 6094107.

It is an arithmetic number, because the mean of its divisors is an integer number (6094107).

Almost surely, 2^12188213 is an apocalyptic number.

It is an amenable number.

12188213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12188213 is an equidigital number, since it uses as much as digits as its factorization.

12188213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 26.

The square root of 12188213 is about 3491.1621274298. The cubic root of 12188213 is about 230.1335896896.

The spelling of 12188213 in words is "twelve million, one hundred eighty-eight thousand, two hundred thirteen".