111116231 has 2 divisors, whose sum is σ = 111116232. Its totient is φ = 111116230.

The previous prime is 111116189. The next prime is 111116251. The reversal of 111116231 is 132611111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111116231 - 2¹⁴ = 111099847 is a prime.

It is a super-2 number, since 2×111116231² = 24693633583290722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111116251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55558115 + 55558116.

It is an arithmetic number, because the mean of its divisors is an integer number (55558116).

Almost surely, 2^111116231 is an apocalyptic number.

111116231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111116231 is an equidigital number, since it uses as much as digits as its factorization.

111116231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 17.

The square root of 111116231 is about 10541.1683887508. The cubic root of 111116231 is about 480.7572408133.

Adding to 111116231 its reverse (132611111), we get a palindrome (243727342).

The spelling of 111116231 in words is "one hundred eleven million, one hundred sixteen thousand, two hundred thirty-one".