111320291 has 2 divisors, whose sum is σ = 111320292. Its totient is φ = 111320290.

The previous prime is 111320239. The next prime is 111320317. The reversal of 111320291 is 192023111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111320291 - 2¹⁸ = 111058147 is a prime.

It is not a weakly prime, because it can be changed into another prime (111320491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55660145 + 55660146.

It is an arithmetic number, because the mean of its divisors is an integer number (55660146).

Almost surely, 2^111320291 is an apocalyptic number.

111320291 is a deficient number, since it is larger than the sum of its proper divisors (1).

111320291 is an equidigital number, since it uses as much as digits as its factorization.

111320291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 111320291 is about 10550.8431416641. The cubic root of 111320291 is about 481.0513572496.

The spelling of 111320291 in words is "one hundred eleven million, three hundred twenty thousand, two hundred ninety-one".