SELECT
A,
LENGTH(A) LENGTH_A,
B,
LENGTH(B) LENGTH_B,
UTL_RAW.BIT_AND(TRIM(A),TRIM(B)) AND_AB,
LENGTH(UTL_RAW.BIT_AND(TRIM(A), TRIM(B))) LENGTH_AND_AB FROM (
SELECT
    TRIM(RPAD('0', LENGTH('1111111111111100000000000000011') - 30    ,'0')) || '1' ||TRIM(RPAD('0', 29, '0')) A,
'1111111111111100000000000000011' B FROM DUAL);

A                                 LENGTH_A  B                               LENGTH_B  AND_AB                           LENGTH_AND_B
0100000000000000000000000000000   31        1111111111111100000000000000011 31        00100000000000000000000000000000 32