you are probably aware leetcode doesnt rank people after 5 million and just says Rank ~5.000.000 to newbies.

in the https://leetcode.com/progress/ page, theres this part on the right which shows

well i rank 218867 and thats past 98.2%

doing the math you get roughly 12159278 (12.2 million users) (currently) (at the time of writing this.) (28.12.2024) (12.28.2024 for americans)

anyhow now you know