12416221 has 2 divisors, whose sum is σ = 12416222. Its totient is φ = 12416220.

The previous prime is 12416203. The next prime is 12416249. The reversal of 12416221 is 12261421.

12416221 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., 10208025 + 2208196 = 3195^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 12416221 - 2⁵ = 12416189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12416281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6208110 + 6208111.

It is an arithmetic number, because the mean of its divisors is an integer number (6208111).

Almost surely, 2^12416221 is an apocalyptic number.

It is an amenable number.

12416221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12416221 is an equidigital number, since it uses as much as digits as its factorization.

12416221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 19.

The square root of 12416221 is about 3523.6658468135. The cubic root of 12416221 is about 231.5597887578.

Adding to 12416221 its reverse (12261421), we get a palindrome (24677642).

The spelling of 12416221 in words is "twelve million, four hundred sixteen thousand, two hundred twenty-one".