My JEE MAINS rank is 115000. Is there any chance of getting admission in NITs or iiits??

Hii Ayush.
Your rank is quite high.
As per the previous year cutoffs you have tough chance of getting any NIT or IIIT or GFTI.
If your luck favours then you might get some seats of lower ranked NITs and IIITs in the later rounds.
NITs such as NIT Patna, NIT Durgapur, NIT Andhra, NIT Uttarakhand, NITs from North-east,etc
And some IIITs such as IIIT Kota, IIIT Ranchi, IIIT Guwahati,etc.

All the best

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https://engineering.careers360.com/jee-main-college-predictor