12216719 has 2 divisors, whose sum is σ = 12216720. Its totient is φ = 12216718.

The previous prime is 12216671. The next prime is 12216731. The reversal of 12216719 is 91761221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12216719 - 2¹² = 12212623 is a prime.

It is a super-2 number, since 2×12216719² = 298496446249922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12216691 and 12216700.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6108359 + 6108360.

It is an arithmetic number, because the mean of its divisors is an integer number (6108360).

Almost surely, 2^12216719 is an apocalyptic number.

12216719 is a deficient number, since it is larger than the sum of its proper divisors (1).

12216719 is an equidigital number, since it uses as much as digits as its factorization.

12216719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 29.

The square root of 12216719 is about 3495.2423378072. The cubic root of 12216719 is about 230.3128634514.

The spelling of 12216719 in words is "twelve million, two hundred sixteen thousand, seven hundred nineteen".