12212237 has 2 divisors, whose sum is σ = 12212238. Its totient is φ = 12212236.

The previous prime is 12212201. The next prime is 12212279. The reversal of 12212237 is 73221221.

12212237 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7806436 + 4405801 = 2794^2 + 2099^2 .

It is an emirp because it is prime and its reverse (73221221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12212237 - 2⁶ = 12212173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106118 + 6106119.

It is an arithmetic number, because the mean of its divisors is an integer number (6106119).

Almost surely, 2^12212237 is an apocalyptic number.

It is an amenable number.

12212237 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212237 is an equidigital number, since it uses as much as digits as its factorization.

12212237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 20.

The square root of 12212237 is about 3494.6011217305. The cubic root of 12212237 is about 230.2846947176.

Adding to 12212237 its reverse (73221221), we get a palindrome (85433458).

The spelling of 12212237 in words is "twelve million, two hundred twelve thousand, two hundred thirty-seven".