111112031231 has 2 divisors, whose sum is σ = 111112031232. Its totient is φ = 111112031230.

The previous prime is 111112031213. The next prime is 111112031243. The reversal of 111112031231 is 132130211111.

Together with previous prime (111112031213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (132130211111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111112031231 - 2¹⁰ = 111112030207 is a prime.

It is a super-2 number, since 2×111112031231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111112031131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55556015615 + 55556015616.

It is an arithmetic number, because the mean of its divisors is an integer number (55556015616).

Almost surely, 2^111112031231 is an apocalyptic number.

111112031231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111112031231 is an equidigital number, since it uses as much as digits as its factorization.

111112031231 is an odious number, because the sum of its binary digits is odd.

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

Adding to 111112031231 its reverse (132130211111), we get a palindrome (243242242342).

The spelling of 111112031231 in words is "one hundred eleven billion, one hundred twelve million, thirty-one thousand, two hundred thirty-one".