12216499 has 2 divisors, whose sum is σ = 12216500. Its totient is φ = 12216498.

The previous prime is 12216497. The next prime is 12216539. The reversal of 12216499 is 99461221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12216499 - 2¹ = 12216497 is a prime.

Together with 12216497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12216493) 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, 6108249 + 6108250.

It is an arithmetic number, because the mean of its divisors is an integer number (6108250).

Almost surely, 2^12216499 is an apocalyptic number.

12216499 is a deficient number, since it is larger than the sum of its proper divisors (1).

12216499 is an equidigital number, since it uses as much as digits as its factorization.

12216499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 12216499 is about 3495.2108663141. The cubic root of 12216499 is about 230.3114809434.

The spelling of 12216499 in words is "twelve million, two hundred sixteen thousand, four hundred ninety-nine".