1109310203 has 4 divisors (see below), whose sum is σ = 1109553768. Its totient is φ = 1109066640.

The previous prime is 1109310199. The next prime is 1109310239. The reversal of 1109310203 is 3020139011.

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 1109310203 - 2² = 1109310199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1109310703) 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, 114818 + ... + 124103.

It is an arithmetic number, because the mean of its divisors is an integer number (277388442).

Almost surely, 2^1109310203 is an apocalyptic number.

1109310203 is a deficient number, since it is larger than the sum of its proper divisors (243565).

1109310203 is an equidigital number, since it uses as much as digits as its factorization.

1109310203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243564.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1109310203 is about 33306.3087567506. The cubic root of 1109310203 is about 1035.1842820286.

Adding to 1109310203 its reverse (3020139011), we get a palindrome (4129449214).

The spelling of 1109310203 in words is "one billion, one hundred nine million, three hundred ten thousand, two hundred three".