You could try:
find . -inum 12321475 -exec mv {} new-filename \;
or
find . -inum 12321475 -print0 | xargs -0 mv -t new-filename
Generally I prefer xargs over exec. Google for why. It's tricky though. See find -exec + vs find | xargs: which one to choose?find -exec + vs find | xargs: which one to choose?