113240123 has 4 divisors (see below), whose sum is σ = 113661360. Its totient is φ = 112818888.

The previous prime is 113240119. The next prime is 113240143. The reversal of 113240123 is 321042311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321042311 = 3517 ⋅91283.

It is a cyclic number.

It is not a de Polignac number, because 113240123 - 2² = 113240119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113240143) 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, 210215 + ... + 210752.

It is an arithmetic number, because the mean of its divisors is an integer number (28415340).

Almost surely, 2^113240123 is an apocalyptic number.

113240123 is a deficient number, since it is larger than the sum of its proper divisors (421237).

113240123 is an equidigital number, since it uses as much as digits as its factorization.

113240123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421236.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 113240123 is about 10641.4342548361. The cubic root of 113240123 is about 483.8010175725.

Adding to 113240123 its reverse (321042311), we get a palindrome (434282434).

The spelling of 113240123 in words is "one hundred thirteen million, two hundred forty thousand, one hundred twenty-three".