Yes, several.

You can check yourself with prototype

From the docs:

If FUNCTION is a string starting with CORE:: , the rest is taken as a name for a Perl builtin.

If the builtin's arguments cannot be adequately expressed by a prototype (such as system), prototype returns undef, because the builtin does not really behave like a Perl function.

Otherwise, the string describing the equivalent prototype is returned.

Is there any built-in without a prototype?

On 5.28, prototype returns undef for at least the following (I may have missed a few, and I omitted most things that I think most people would classify as keywords and operators instead of functions, like use, goto, and -X):

chomp
chop
defined
delete
do
eval
exec
exists
grep
map
print
printf
require
return
say
select
sort
split
system
[download]

Added minor clarifications.

> most people would classify as keywords and operators instead of functions

For me any reserved word is a keyword, this includes functions.

I know what you mean but "keyword" doesn't describe it.

See also perlfunc#Perl-Functions-by-Category ... which is even more confusing.

Cheers Rolf
_{(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery}

Yes, good point, I was thinking of e.g. if and for, but I didn't list goto but did list return - now that I think about it some more, I probably shouldn't have listed the latter because it can't really be approximated by a sub (that's how I personally generally differentiate between "functions" and "operators" in Perl, but this isn't perfect and a pretty big grey area).