12 times 21 is 252. In symbols: 12 × 21 = 252, and 21 × 12 = 252 too.
12 × 21 means adding 12 to itself 21 times: that is 21 copies of 12, which add up to 252.
12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, ... (keep going to the 21th multiple). The 21th multiple of 12 is 252.
12 × 21 = 12 × 20 + 12 × 1 = 240 + 12 = 252.
Halve one number and double the other: 12 × 21 = 6 × 42 = 252.
252 ÷ 12 = 21
252 ÷ 21 = 12
252 is even. Prime factorization: 2 × 2 × 3 × 3 × 7.
| Multiplication | Answer |
|---|---|
| 11 × 21 | 231 |
| 13 × 21 | 273 |
| 12 × 20 | 240 |
| 12 × 22 | 264 |
| 12 × 23 | 276 |
| 12 × 19 | 228 |
| 14 × 21 | 294 |
| 10 × 21 | 210 |
Other numbers? Browse the multiplication table, the squares and cubes or the exponent calculator.