111242243 has 4 divisors (see below), whose sum is σ = 127134000. Its totient is φ = 95350488.

The previous prime is 111242233. The next prime is 111242249. The reversal of 111242243 is 342242111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342242111 = 1123 ⋅304757.

It is a cyclic number.

It is not a de Polignac number, because 111242243 - 2¹⁴ = 111225859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111242249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7945868 + ... + 7945881.

It is an arithmetic number, because the mean of its divisors is an integer number (31783500).

Almost surely, 2^111242243 is an apocalyptic number.

111242243 is a deficient number, since it is larger than the sum of its proper divisors (15891757).

111242243 is an equidigital number, since it uses as much as digits as its factorization.

111242243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15891756.

The product of its digits is 384, while the sum is 20.

The square root of 111242243 is about 10547.1438313887. The cubic root of 111242243 is about 480.9389073274.

Adding to 111242243 its reverse (342242111), we get a palindrome (453484354).

The spelling of 111242243 in words is "one hundred eleven million, two hundred forty-two thousand, two hundred forty-three".