The 21 times table shows the result of multiplying 21 by other integers. Mastering it benefits mathematical proficiency and enhances cognitive capabilities. Understanding the 21 x table boosts students' academic self-esteem in math. In the 21x table, the last digit in the product is always the number that 21 is multiplied by. For example, 21 x 3 = 63. See the twenty-one times table below.