1112123231 has 2 divisors, whose sum is σ = 1112123232. Its totient is φ = 1112123230.

The previous prime is 1112123191. The next prime is 1112123251. The reversal of 1112123231 is 1323212111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1112123231 - 2¹⁸ = 1111861087 is a prime.

It is a super-2 number, since 2×1112123231² = 2473636161859758722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1112123251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556061615 + 556061616.

It is an arithmetic number, because the mean of its divisors is an integer number (556061616).

Almost surely, 2^1112123231 is an apocalyptic number.

1112123231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112123231 is an equidigital number, since it uses as much as digits as its factorization.

1112123231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 17.

The square root of 1112123231 is about 33348.5116759354. The cubic root of 1112123231 is about 1036.0585623912.

Adding to 1112123231 its reverse (1323212111), we get a palindrome (2435335342).

The spelling of 1112123231 in words is "one billion, one hundred twelve million, one hundred twenty-three thousand, two hundred thirty-one".