113123111 has 4 divisors (see below), whose sum is σ = 113232000. Its totient is φ = 113014224.

The previous prime is 113123089. The next prime is 113123137. The reversal of 113123111 is 111321311.

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 113123111 - 2⁶ = 113123047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113123611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52871 + ... + 54968.

It is an arithmetic number, because the mean of its divisors is an integer number (28308000).

Almost surely, 2^113123111 is an apocalyptic number.

113123111 is a deficient number, since it is larger than the sum of its proper divisors (108889).

113123111 is a wasteful number, since it uses less digits than its factorization.

113123111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108888.

The product of its digits is 18, while the sum is 14.

The square root of 113123111 is about 10635.9348907372. The cubic root of 113123111 is about 483.6343215491.

Adding to 113123111 its reverse (111321311), we get a palindrome (224444422).

It can be divided in two parts, 1131 and 23111, that added together give a palindrome (24242).

The spelling of 113123111 in words is "one hundred thirteen million, one hundred twenty-three thousand, one hundred eleven".