1112231231 has 4 divisors (see below), whose sum is σ = 1139358864. Its totient is φ = 1085103600.

The previous prime is 1112231203. The next prime is 1112231251. The reversal of 1112231231 is 1321322111.

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-1112231231 is a prime.

It is a super-2 number, since 2×1112231231² = 2474116622423550722, 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 (1112231201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13563755 + ... + 13563836.

It is an arithmetic number, because the mean of its divisors is an integer number (284839716).

Almost surely, 2^1112231231 is an apocalyptic number.

1112231231 is a deficient number, since it is larger than the sum of its proper divisors (27127633).

1112231231 is an equidigital number, since it uses as much as digits as its factorization.

1112231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27127632.

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

The square root of 1112231231 is about 33350.1308992933. The cubic root of 1112231231 is about 1036.0920990533.

Adding to 1112231231 its reverse (1321322111), we get a palindrome (2433553342).

The spelling of 1112231231 in words is "one billion, one hundred twelve million, two hundred thirty-one thousand, two hundred thirty-one".