221103103 has 4 divisors (see below), whose sum is σ = 238111048. Its totient is φ = 204095160.

The previous prime is 221103079. The next prime is 221103131. The reversal of 221103103 is 301301122.

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 2^k-221103103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 17007931 = 221103103 / (2 + 2 + 1 + 1 + 0 + 3 + 1 + 0 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221103193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8503953 + ... + 8503978.

It is an arithmetic number, because the mean of its divisors is an integer number (59527762).

Almost surely, 2^221103103 is an apocalyptic number.

221103103 is a deficient number, since it is larger than the sum of its proper divisors (17007945).

221103103 is a wasteful number, since it uses less digits than its factorization.

221103103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17007944.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 221103103 is about 14869.5360721174. The cubic root of 221103103 is about 604.6883653343.

Adding to 221103103 its reverse (301301122), we get a palindrome (522404225).

The spelling of 221103103 in words is "two hundred twenty-one million, one hundred three thousand, one hundred three".