The largest 10-digit number with no digit repeated is 9876543210 !
The largest ten digit number with no repeated digits is '9876543210'.
The largest ten digit number with no repeated digits is '9876543210'.
The largest number with no repeated digits is 9,876,543,210 although it is 10 digits long, the largest 3 digit number with no repeated digits is 987
9876543210
9876
The largest ten digit number with no repeated digits is '9876543210'.
Well, honey, the largest 12-digit number with repeated digits allowed is 9,999,999,999,999. I mean, unless you want to get fancy and start throwing in letters or emojis, but I doubt that's what you're looking for. So there you have it, the biggest 12-digit number you can get with the same digit repeated over and over again.
9870
It is 97
987654
9,999,999,999