999999999999
12
999 999 999 990
100000000000
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.
999999999999
12
999 999 999 990
930
No 5 digit number can equal 12 and so there can be no answer to the question.
100000000000
999,799,949,899
-9
How about: 960
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.
BBB which, in decimal, is equal to 1727 (= 123 - 1)
100,000,000,009 or .000000000009