Q: Is 21,511,221 a Palindrome?
A: No, the number 21,511,221 is not a palindrome.
A palindromic number is number that remains the same when its digits are reversed.
Here's how to check if a number is a palindrome:
Step 1
Take the original number and reverse it.
Here is the original number color coded:
21511221
Now we reverse it like this:
12211512
Notice the colors are going in the opposite direction now
Step 2
Compare the two numbers. If they are exactly the same then the number is a palindrome.
Is 21511221 = 12211512?
Answer:
NO, so that means the number 21,511,221 is not a palindrome!
Here are more examples of potential palindrome numbers in sequence:
| Number | 21,511,219 | 21,511,220 | 21,511,222 | 21,511,223 |
| Palindrome? | no | no | no | no |