It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 121 109 is not a prime number.
For example, 121 109 can be divided by 163: 121 109 / 163 = 743.
For 121 109 to be a prime number, it would have been required that 121 109 has only two divisors, i.e., itself and 1.
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121 109 is an odd number, because it is not evenly divisible by 2.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 121 109 is about 348.007.
Thus, the square root of 121 109 is not an integer, and therefore 121 109 is not a square number.
The square of a number (here 121 109) is the result of the product of this number (121 109) by itself (i.e., 121 109 × 121 109); the square of 121 109 is sometimes called "raising 121 109 to the power 2", or "121 109 squared".
The square of 121 109 is 14 667 389 881 because 121 109 × 121 109 = 121 1092 = 14 667 389 881.
As a consequence, 121 109 is the square root of 14 667 389 881.
The multiples of 121 109 are all integers evenly divisible by 121 109, that is all numbers such that the remainder of the division by 121 109 is zero. There are infinitely many multiples of 121 109. The smallest multiples of 121 109 are: