11112443231 has 4 divisors (see below), whose sum is σ = 11199942912. Its totient is φ = 11024943552.

The previous prime is 11112443207. The next prime is 11112443239. The reversal of 11112443231 is 13234421111.

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

It is a cyclic number.

It is not a de Polignac number, because 11112443231 - 2²² = 11108248927 is a prime.

It is a super-2 number, since 2×11112443231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11112443197 and 11112443206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112443239) 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, 43749650 + ... + 43749903.

It is an arithmetic number, because the mean of its divisors is an integer number (2799985728).

Almost surely, 2^11112443231 is an apocalyptic number.

11112443231 is a deficient number, since it is larger than the sum of its proper divisors (87499681).

11112443231 is an equidigital number, since it uses as much as digits as its factorization.

11112443231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87499680.

The product of its digits is 576, while the sum is 23.

Adding to 11112443231 its reverse (13234421111), we get a palindrome (24346864342).

The spelling of 11112443231 in words is "eleven billion, one hundred twelve million, four hundred forty-three thousand, two hundred thirty-one".