12111899 has 2 divisors, whose sum is σ = 12111900. Its totient is φ = 12111898.

The previous prime is 12111893. The next prime is 12111901. The reversal of 12111899 is 99811121.

It is a strong prime.

It is an emirp because it is prime and its reverse (99811121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12111899 is a prime.

Together with 12111901, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 6.

It is not a weakly prime, because it can be changed into another prime (12111893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055949 + 6055950.

It is an arithmetic number, because the mean of its divisors is an integer number (6055950).

Almost surely, 2^12111899 is an apocalyptic number.

12111899 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111899 is an equidigital number, since it uses as much as digits as its factorization.

12111899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 32.

The square root of 12111899 is about 3480.2153668990. The cubic root of 12111899 is about 229.6522722810.

The spelling of 12111899 in words is "twelve million, one hundred eleven thousand, eight hundred ninety-nine".