How to find out oracle and OS version is either 32 bit or 64bit

Oracle

SQL> select length(addr)*4 || '-Bits' Word_length_32_or_64 from v$process where rownum=1;

WORD_LENGTH_32_OR_64

---------------------------------------------

32-Bits

OS – UNIX

db0211> isainfo -kv

64-bit sparcv9 kernel modules