what is my rank.i had scored 52 percentile in JEE main 2021.which IIIT can I get with this percentile under ST category.

Hello Aspirant,
With 52 percentile in JEE your rank can range approximately between 4,37,236 - 4,45,000. You can predict your marks by the below link provided. Better go for other private colleges as your JEE rank is too high to get an admission in government colleges like NIT'S and IIIT'S.  You have almost null chances to get admission in any govt college through jee mains. If you are really passionate about Computer Science, you should look for some other good colleges, pvt or govt. Or you can apply for some other state engineering colleges. According to you, if you get 52 marks in JEE Mains (27 July 2nd shift) then your percentile would be around 84.58 - 87.7 (considering difficult ) and 77.89 - 81.31 (considering moderate ).
As the cut-offs are released along with the JEE-Main 2022 result so for now you can get an idea from JEE-Main 2021 qualifying cut-offs that are enlisted below :-
Common Rank List (CRL) - 87.8992241-100.0000000 Percentile
GEN-EWS - 66.2214845-87.8950071 Percentile
Other Backward Classes (OBC-NCL) - 68.0234447-87.8950071 Percentile
Scheduled Caste (SC) - 46.8825338-87.8950071 Percentile
Scheduled Tribe (ST) - 34.6728999 87.8474721 Percentile
PwD - 0.0096375-87.8273359 Percentile
Note that in above table it is not the actual cut-off for JEE-Main 2022 but previous year's cut-off.

Dear Aspirant ,

As you know that the JEE main results has been published , so if  you can share  your rank here instead of your percentile , so that I can help you more accurately by providing college details , as all the admissions is done through JEE Main rank only.

Still, you can use the JEE MAIN rank predictor tool for your satisfaction !

Well, as per previous year cut-off trends , with your given percentile and caste category.. you have very less chances to get any IIITs .

Refer to this link to find the previous year IIITs cut-off:

https://engineering.careers360.com/articles/jee-main-cutoff-for-top-iiits

Well, you need to remember that every  year's cutoff of JEE MAIN depends on some following factors :

• No of Students appeared for exam
• Seat Matrix
• Difficulty level  of exam

To find other any other well known colleges in your nearby location for getting admission through your given rank , refer to this JEE Main college predictor link:

https://engineering.careers360.com/jee-main-college-predictor?utm_source=qna&utm_medium=jee_cp

Hope this helps !
Best wishes !!