12216619 has 2 divisors, whose sum is σ = 12216620. Its totient is φ = 12216618.

The previous prime is 12216593. The next prime is 12216643. The reversal of 12216619 is 91661221.

12216619 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12216619 is a prime.

It is a super-2 number, since 2×12216619² = 298491559582322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12216119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6108309 + 6108310.

It is an arithmetic number, because the mean of its divisors is an integer number (6108310).

Almost surely, 2^12216619 is an apocalyptic number.

12216619 is a deficient number, since it is larger than the sum of its proper divisors (1).

12216619 is an equidigital number, since it uses as much as digits as its factorization.

12216619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The square root of 12216619 is about 3495.2280326182. The cubic root of 12216619 is about 230.3122350407.

The spelling of 12216619 in words is "twelve million, two hundred sixteen thousand, six hundred nineteen".