It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 2 010 521 is not a prime number.
For example, 2 010 521 can be divided by 853: 2 010 521 / 853 = 2 357.
For 2 010 521 to be a prime number, it would have been required that 2 010 521 has only two divisors, i.e., itself and 1.
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2 010 521 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 2 010 521 is about 1 417.928.
Thus, the square root of 2 010 521 is not an integer, and therefore 2 010 521 is not a square number.
The square of a number (here 2 010 521) is the result of the product of this number (2 010 521) by itself (i.e., 2 010 521 × 2 010 521); the square of 2 010 521 is sometimes called "raising 2 010 521 to the power 2", or "2 010 521 squared".
The square of 2 010 521 is 4 042 194 691 441 because 2 010 521 × 2 010 521 = 2 010 5212 = 4 042 194 691 441.
As a consequence, 2 010 521 is the square root of 4 042 194 691 441.
The multiples of 2 010 521 are all integers evenly divisible by 2 010 521, that is all numbers such that the remainder of the division by 2 010 521 is zero. There are infinitely many multiples of 2 010 521. The smallest multiples of 2 010 521 are: