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The numbers 11111 and 111111 are both equal to five when written out as words. However, when written as digits they represent different numbers. 11111 is a five-digit number while 111111 is a six-digit number.

11111 is the smallest five-digit number and is composed of a single row of five ones which is why it is sometimes referred to as the “one-one-one-one-one” number. On the other hand, 111111 is composed of six ones in two rows of three.

While these two numbers may look similar and share the same value when written as words, they have distinct features. 11111 has an even number of divisors, where 111111 has an odd number of divisors. This means that it is much more likely for 111111 to be the product of two or more numbers. 111111 also has more prime factors than 11111 since a prime number only has two factors: itself and one.

In terms of arithmetic, 11111 has only addition and subtraction as possible operations, while 111111 can use multiplication and division as well. This makes it easier to calculate with 111111, especially when longer equations are used.

In a nutshell, when written as words, both numbers have the same value but they differ drastically when written as digits. 11111 is a five-digit number while 111111 is a six-digit number. 11111 has an even number of divisors, and only has addition and subtraction as possible operations, while 111111 has an odd number of divisors and can use multiplication and division as well.