Is 221021 a prime number?

221 021 is an odd number, because it is not evenly divisible by 2.

Find out more:

• What is an even number?

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 221 021 is about 470.129.

Thus, the square root of 221 021 is not an integer, and therefore 221 021 is not a square number.

Anyway, 221 021 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 221 021) is the result of the product of this number (221 021) by itself (i.e., 221 021 × 221 021); the square of 221 021 is sometimes called "raising 221 021 to the power 2", or "221 021 squared".

The square of 221 021 is 48 850 282 441 because 221 021 × 221 021 = 221 021² = 48 850 282 441.

As a consequence, 221 021 is the square root of 48 850 282 441.

221 021 is a number with 6 digits.

The multiples of 221 021 are all integers evenly divisible by 221 021, that is all numbers such that the remainder of the division by 221 021 is zero. There are infinitely many multiples of 221 021. The smallest multiples of 221 021 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 221 021 too, since 0 × 221 021 = 0
• 221 021: indeed, 221 021 is a multiple of itself, since 221 021 is evenly divisible by 221 021 (we have 221 021 / 221 021 = 1, so the remainder of this division is indeed zero)
• 442 042: indeed, 442 042 = 221 021 × 2
• 663 063: indeed, 663 063 = 221 021 × 3
• 884 084: indeed, 884 084 = 221 021 × 4
• 1 105 105: indeed, 1 105 105 = 221 021 × 5
• etc.

• Preceding numbers: …221 019, 221 020
• Following numbers: 221 022, 221 023…

Nearest numbers from 221 021

• Preceding prime number: 220 973
• Following prime number: 221 047

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• 221 021 est-il un nombre premier ?