There are an infinite number of pairs that can be multiplied and get 121.
If you only use positive whole numbers, then there are only two answers:
[ 1 times 121 ] and [ 11 times 11 ].
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121 divided by 6 equals 20 with a remainder of 1.
The number that equals 121 when squared is 11.
If: 11y = 121 Then: y = 11
121 is the answer
121 is, itself, a perfect square.