+**221** is a natural [number](/wiki/Number) that follows 220 and precedes 222. As a [composite number](/wiki/Composite_number), it is the product of 13 and 17. This value can also refer to the [year](/wiki/Year) 221.
+## See also
+- [Prime Number](/wiki/Prime_number)
+- [Integer](/wiki/Integer)
+- [Factor](/wiki/Factor)
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