1111231123 has 4 divisors (see below), whose sum is σ = 1118689200. Its totient is φ = 1103773048.

The previous prime is 1111231117. The next prime is 1111231151. The reversal of 1111231123 is 3211321111.

It is a happy number.

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 1111231123 - 2⁵ = 1111231091 is a prime.

It is a super-2 number, since 2×1111231123² = 2469669217447682258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111231097 and 1111231106.

It is not an unprimeable number, because it can be changed into a prime (1111231103) 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, 3728815 + ... + 3729112.

It is an arithmetic number, because the mean of its divisors is an integer number (279672300).

Almost surely, 2^1111231123 is an apocalyptic number.

1111231123 is a deficient number, since it is larger than the sum of its proper divisors (7458077).

1111231123 is an equidigital number, since it uses as much as digits as its factorization.

1111231123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7458076.

The product of its digits is 36, while the sum is 16.

The square root of 1111231123 is about 33335.1334630597. The cubic root of 1111231123 is about 1035.7814577930.

Adding to 1111231123 its reverse (3211321111), we get a palindrome (4322552234).

The spelling of 1111231123 in words is "one billion, one hundred eleven million, two hundred thirty-one thousand, one hundred twenty-three".