12216299 has 2 divisors, whose sum is σ = 12216300. Its totient is φ = 12216298.

The previous prime is 12216283. The next prime is 12216301. The reversal of 12216299 is 99261221.

It is a strong prime.

It is an emirp because it is prime and its reverse (99261221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12216299 - 2⁴ = 12216283 is a prime.

It is a super-2 number, since 2×12216299² = 298475922514802, which contains 22 as substring.

Together with 12216301, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (12216209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6108149 + 6108150.

It is an arithmetic number, because the mean of its divisors is an integer number (6108150).

Almost surely, 2^12216299 is an apocalyptic number.

12216299 is a deficient number, since it is larger than the sum of its proper divisors (1).

12216299 is an equidigital number, since it uses as much as digits as its factorization.

12216299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 32.

The square root of 12216299 is about 3495.1822556199. The cubic root of 12216299 is about 230.3102241036.

The spelling of 12216299 in words is "twelve million, two hundred sixteen thousand, two hundred ninety-nine".