1123230111 has 12 divisors (see below), whose sum is σ = 1530191832. Its totient is φ = 732883408.

The previous prime is 1123230091. The next prime is 1123230169. The reversal of 1123230111 is 1110323211.

It is a happy number.

It is not a de Polignac number, because 1123230111 - 2¹⁰ = 1123229087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123230211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78120 + ... + 91373.

It is an arithmetic number, because the mean of its divisors is an integer number (127515986).

Almost surely, 2^1123230111 is an apocalyptic number.

1123230111 is a deficient number, since it is larger than the sum of its proper divisors (406961721).

1123230111 is an equidigital number, since it uses as much as digits as its factorization.

1123230111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169590 (or 169543 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1123230111 is about 33514.6253298467. The cubic root of 1123230111 is about 1039.4962152597.

Adding to 1123230111 its reverse (1110323211), we get a palindrome (2233553322).

The spelling of 1123230111 in words is "one billion, one hundred twenty-three million, two hundred thirty thousand, one hundred eleven".