11 is a prime number. A prime number is defined as a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. In simpler terms, a prime number has exactly two distinct positive divisors: 1 and itself.
For 11, the only factors are 1 and 11. There are no other numbers that you can multiply together to arrive at 11. On the other hand, a composite number is one that has more than two factors. For example, 4 is composite because it can be divided by 1, 2, and 4.
To summarize, since 11 can only be divided evenly by 1 and 11, it is classified as a prime number.