111231271 has 2 divisors, whose sum is σ = 111231272. Its totient is φ = 111231270.

The previous prime is 111231251. The next prime is 111231283. The reversal of 111231271 is 172132111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111231271 - 2⁷ = 111231143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111231251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55615635 + 55615636.

It is an arithmetic number, because the mean of its divisors is an integer number (55615636).

Almost surely, 2^111231271 is an apocalyptic number.

111231271 is a deficient number, since it is larger than the sum of its proper divisors (1).

111231271 is an equidigital number, since it uses as much as digits as its factorization.

111231271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 19.

The square root of 111231271 is about 10546.6236777464. The cubic root of 111231271 is about 480.9230948834.

Adding to 111231271 its reverse (172132111), we get a palindrome (283363382).

The spelling of 111231271 in words is "one hundred eleven million, two hundred thirty-one thousand, two hundred seventy-one".