It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 201 021 is not a prime number.
For example, 201 021 can be divided by 3: 201 021 / 3 = 67 007.
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For 201 021 to be a prime number, it would have been required that 201 021 has only two divisors, i.e., itself and 1.
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201 021 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 201 021 is about 448.354.
Thus, the square root of 201 021 is not an integer, and therefore 201 021 is not a square number.
The square of a number (here 201 021) is the result of the product of this number (201 021) by itself (i.e., 201 021 × 201 021); the square of 201 021 is sometimes called "raising 201 021 to the power 2", or "201 021 squared".
The square of 201 021 is 40 409 442 441 because 201 021 × 201 021 = 201 0212 = 40 409 442 441.
As a consequence, 201 021 is the square root of 40 409 442 441.
The multiples of 201 021 are all integers evenly divisible by 201 021, that is all numbers such that the remainder of the division by 201 021 is zero. There are infinitely many multiples of 201 021. The smallest multiples of 201 021 are: