1112312231 has 4 divisors (see below), whose sum is σ = 1170855000. Its totient is φ = 1053769464.

The previous prime is 1112312213. The next prime is 1112312233. The reversal of 1112312231 is 1322132111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1112312231 is a prime.

It is a super-2 number, since 2×1112312231² = 2474476998464394722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112312233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29271356 + ... + 29271393.

It is an arithmetic number, because the mean of its divisors is an integer number (292713750).

Almost surely, 2^1112312231 is an apocalyptic number.

1112312231 is a deficient number, since it is larger than the sum of its proper divisors (58542769).

1112312231 is an equidigital number, since it uses as much as digits as its factorization.

1112312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58542768.

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

The square root of 1112312231 is about 33351.3452652213. The cubic root of 1112312231 is about 1036.1172501251.

Adding to 1112312231 its reverse (1322132111), we get a palindrome (2434444342).

The spelling of 1112312231 in words is "one billion, one hundred twelve million, three hundred twelve thousand, two hundred thirty-one".