It is a happy number.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-100011103 is a prime.
It is a Duffinian number.
It is a congruent number.
Almost surely, 2100011103 is an apocalyptic number.
100011103 is an equidigital number, since it uses as much as digits as its factorization.
100011103 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 787616.
The square root of 100011103 is about 10000.5551345913. Note that the first 3 decimals coincide. The cubic root of 100011103 is about 464.1760612458.
Adding to 100011103 its reverse (301110001), we get a palindrome (401121104).
The spelling of 100011103 in words is "one hundred million, eleven thousand, one hundred three".