Q: What is the digital root of 100,021,221

 A: 9

Why is 9 the digital root of the number 100,021,221?

The digital root of a number is calculated by splitting the digits of a number and then adding them together. You keep splitting and adding the digits until you reach a single positive number.

How do you calculate the digital root of 100,021,221?


Split the number up and add each digit together:


1 + 0 + 0 + 0 + 2 + 1 + 2 + 2 + 1 = 9


What is the digital root of number 100,021,221?

Answer: 9


More Examples

Number 100,021,219100,021,220100,021,222100,021,223
Digital Root 7812

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