123112243 has 4 divisors (see below), whose sum is σ = 123134440. Its totient is φ = 123090048.

The previous prime is 123112211. The next prime is 123112247. The reversal of 123112243 is 342211321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 123112243 - 2⁵ = 123112211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123112243.

It is not an unprimeable number, because it can be changed into a prime (123112247) 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, 5203 + ... + 16531.

It is an arithmetic number, because the mean of its divisors is an integer number (30783610).

Almost surely, 2^123112243 is an apocalyptic number.

123112243 is a deficient number, since it is larger than the sum of its proper divisors (22197).

123112243 is a wasteful number, since it uses less digits than its factorization.

123112243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22196.

The product of its digits is 288, while the sum is 19.

The square root of 123112243 is about 11095.5956577374. The cubic root of 123112243 is about 497.4702126051.

Adding to 123112243 its reverse (342211321), we get a palindrome (465323564).

The spelling of 123112243 in words is "one hundred twenty-three million, one hundred twelve thousand, two hundred forty-three".