113121111 has 16 divisors (see below), whose sum is σ = 161288928. Its totient is φ = 70272000.

The previous prime is 113121103. The next prime is 113121121. The reversal of 113121111 is 111121311.

It is not a de Polignac number, because 113121111 - 2³ = 113121103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113121101) 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 15 ways as a sum of consecutive naturals, for example, 5830 + ... + 16131.

It is an arithmetic number, because the mean of its divisors is an integer number (10080558).

Almost surely, 2^113121111 is an apocalyptic number.

113121111 is a deficient number, since it is larger than the sum of its proper divisors (48167817).

113121111 is a wasteful number, since it uses less digits than its factorization.

113121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22082.

The product of its digits is 6, while the sum is 12.

The square root of 113121111 is about 10635.8408694376. The cubic root of 113121111 is about 483.6314713377.

Adding to 113121111 its reverse (111121311), we get a palindrome (224242422).

The spelling of 113121111 in words is "one hundred thirteen million, one hundred twenty-one thousand, one hundred eleven".