- 1100101
- 1011001
- 1001001
- 1001000

Option 3 : 1001001

**Calculation:**

⇒ 221221221 = 221000000 + 221000 + 221 = 221 × (1000000 + 1000 + 1)

⇒ 221221221 = 221 × 1001001

Now, 221221221 ÷ 221 = (221 × 1001001) ÷ 221 = 1001001

**∴ When 221221221 is divided by 221, the quotient is 1001001.**

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