No.
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No, 21 is not a palindrome. A palindrome is a number or word that remains the same when read in reverse order. In the case of 21, it is not the same number when read from right to left as it is when read from left to right.
No. 21 is not equal to 12.
There is no palindrome for 14.
Yes, 1331 is a palindrome
"Was it a rat I saw? is a palindrome.
A "one step palindrome is "any number can be changed into a palindrome number by reversing the digits and adding to the original number" one time. For example, the number 23 can be turned into a palindrome in just one step: 23 + 32 = 55 The same goes for the number 12: 12 + 21 = 33