12191299 has 2 divisors, whose sum is σ = 12191300. Its totient is φ = 12191298.

The previous prime is 12191297. The next prime is 12191327. The reversal of 12191299 is 99219121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12191299 - 2¹ = 12191297 is a prime.

Together with 12191297, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12191297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6095649 + 6095650.

It is an arithmetic number, because the mean of its divisors is an integer number (6095650).

Almost surely, 2^12191299 is an apocalyptic number.

12191299 is a deficient number, since it is larger than the sum of its proper divisors (1).

12191299 is an equidigital number, since it uses as much as digits as its factorization.

12191299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 34.

The square root of 12191299 is about 3491.6040726291. The cubic root of 12191299 is about 230.1530109760.

The spelling of 12191299 in words is "twelve million, one hundred ninety-one thousand, two hundred ninety-nine".