Use stringly-typed everything, and always padStart your numbers.
Saves running into issues with numbers outside the 52-bit integer range.
And padding start means you don't have to worry about pesky sort functions.

Just don't do maths. Simple.

Maybe you could do a manual sort.
Provide a "captcha" prompt, and ask which comes first in the list... You know, to make sure the user is a human! And you get free sorting.