111131012231 has 2 divisors, whose sum is σ = 111131012232. Its totient is φ = 111131012230.

The previous prime is 111131012207. The next prime is 111131012257. The reversal of 111131012231 is 132210131111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111131012231 - 2¹⁰ = 111131011207 is a prime.

It is a super-2 number, since 2×111131012231² (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 (111131092231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55565506115 + 55565506116.

It is an arithmetic number, because the mean of its divisors is an integer number (55565506116).

Almost surely, 2^111131012231 is an apocalyptic number.

111131012231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111131012231 is an equidigital number, since it uses as much as digits as its factorization.

111131012231 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 111131012231 its reverse (132210131111), we get a palindrome (243341143342).

The spelling of 111131012231 in words is "one hundred eleven billion, one hundred thirty-one million, twelve thousand, two hundred thirty-one".