111103121 has 4 divisors (see below), whose sum is σ = 112248612. Its totient is φ = 109957632.

The previous prime is 111103079. The next prime is 111103123. The reversal of 111103121 is 121301111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121301111 = 19 ⋅6384269.

It can be written as a sum of positive squares in 2 ways, for example, as 73342096 + 37761025 = 8564^2 + 6145^2 .

It is a cyclic number.

It is not a de Polignac number, because 111103121 - 2¹⁰ = 111102097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111103123) 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, 572600 + ... + 572793.

It is an arithmetic number, because the mean of its divisors is an integer number (28062153).

Almost surely, 2^111103121 is an apocalyptic number.

It is an amenable number.

111103121 is a deficient number, since it is larger than the sum of its proper divisors (1145491).

111103121 is an equidigital number, since it uses as much as digits as its factorization.

111103121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145490.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 111103121 is about 10540.5465228327. The cubic root of 111103121 is about 480.7383327586.

Adding to 111103121 its reverse (121301111), we get a palindrome (232404232).

The spelling of 111103121 in words is "one hundred eleven million, one hundred three thousand, one hundred twenty-one".