111403121 has 4 divisors (see below), whose sum is σ = 111596772. Its totient is φ = 111209472.

The previous prime is 111403093. The next prime is 111403129. The reversal of 111403121 is 121304111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66994225 + 44408896 = 8185^2 + 6664^2 .

It is a cyclic number.

It is not a de Polignac number, because 111403121 - 2¹⁰ = 111402097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111403096 and 111403105.

It is not an unprimeable number, because it can be changed into a prime (111403129) 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 3 ways as a sum of consecutive naturals, for example, 95960 + ... + 97113.

It is an arithmetic number, because the mean of its divisors is an integer number (27899193).

Almost surely, 2^111403121 is an apocalyptic number.

It is an amenable number.

111403121 is a deficient number, since it is larger than the sum of its proper divisors (193651).

111403121 is an equidigital number, since it uses as much as digits as its factorization.

111403121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193650.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 111403121 is about 10554.7676904800. The cubic root of 111403121 is about 481.1706395028.

Adding to 111403121 its reverse (121304111), we get a palindrome (232707232).

The spelling of 111403121 in words is "one hundred eleven million, four hundred three thousand, one hundred twenty-one".