111291199 has 2 divisors, whose sum is σ = 111291200. Its totient is φ = 111291198.

The previous prime is 111291161. The next prime is 111291203. The reversal of 111291199 is 991192111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111291199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111291109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55645599 + 55645600.

It is an arithmetic number, because the mean of its divisors is an integer number (55645600).

Almost surely, 2^111291199 is an apocalyptic number.

111291199 is a deficient number, since it is larger than the sum of its proper divisors (1).

111291199 is an equidigital number, since it uses as much as digits as its factorization.

111291199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 34.

The square root of 111291199 is about 10549.4643939870. The cubic root of 111291199 is about 481.0094482521.

The spelling of 111291199 in words is "one hundred eleven million, two hundred ninety-one thousand, one hundred ninety-nine".