111232123 has 4 divisors (see below), whose sum is σ = 114820288. Its totient is φ = 107643960.

The previous prime is 111232087. The next prime is 111232129. The reversal of 111232123 is 321232111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321232111 = 449 ⋅715439.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111232123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111232097 and 111232106.

It is not an unprimeable number, because it can be changed into a prime (111232129) 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, 1794036 + ... + 1794097.

It is an arithmetic number, because the mean of its divisors is an integer number (28705072).

Almost surely, 2^111232123 is an apocalyptic number.

111232123 is a deficient number, since it is larger than the sum of its proper divisors (3588165).

111232123 is an equidigital number, since it uses as much as digits as its factorization.

111232123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3588164.

The product of its digits is 72, while the sum is 16.

The square root of 111232123 is about 10546.6640697426. The cubic root of 111232123 is about 480.9243227918.

Adding to 111232123 its reverse (321232111), we get a palindrome (432464234).

The spelling of 111232123 in words is "one hundred eleven million, two hundred thirty-two thousand, one hundred twenty-three".