111197231 has 2 divisors, whose sum is σ = 111197232. Its totient is φ = 111197230.

The previous prime is 111197227. The next prime is 111197351. The reversal of 111197231 is 132791111.

It is a weak prime.

It is an emirp because it is prime and its reverse (132791111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111197231 - 2² = 111197227 is a prime.

It is a super-2 number, since 2×111197231² = 24729648364134722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111197231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111197201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55598615 + 55598616.

It is an arithmetic number, because the mean of its divisors is an integer number (55598616).

Almost surely, 2^111197231 is an apocalyptic number.

111197231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111197231 is an equidigital number, since it uses as much as digits as its factorization.

111197231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378, while the sum is 26.

The square root of 111197231 is about 10545.0097676579. The cubic root of 111197231 is about 480.8740310658.

The spelling of 111197231 in words is "one hundred eleven million, one hundred ninety-seven thousand, two hundred thirty-one".