111421107 has 12 divisors (see below), whose sum is σ = 183933360. Its totient is φ = 63669168.

The previous prime is 111421091. The next prime is 111421139. The reversal of 111421107 is 701124111.

It is not a de Polignac number, because 111421107 - 2⁴ = 111421091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111421107.

It is not an unprimeable number, because it can be changed into a prime (111422107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 884232 + ... + 884357.

It is an arithmetic number, because the mean of its divisors is an integer number (15327780).

Almost surely, 2^111421107 is an apocalyptic number.

111421107 is a deficient number, since it is larger than the sum of its proper divisors (72512253).

111421107 is a wasteful number, since it uses less digits than its factorization.

111421107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768602 (or 1768599 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 18.

The square root of 111421107 is about 10555.6196881093. The cubic root of 111421107 is about 481.1965330604.

Adding to 111421107 its reverse (701124111), we get a palindrome (812545218).

The spelling of 111421107 in words is "one hundred eleven million, four hundred twenty-one thousand, one hundred seven".