MPU6050 orientation

I am using MPU6050 for my self balancing bot. Its stuck aka aligned vertically right now, so according to the symbol printed on the sensor- gravity must be acting along the y axis. But when I take the accel values, I get some reading around 16700 along the 'z' axis. Considering its present orientation, the values must be 0 along both x and z axis. I am curious to know, exactly why is this happening?

Pic

I did refer to the pic earlier as well, but well just rotate the thing 90 deg anticlockwise. That's how my sensor is put, that gives me y-axis parallel to gravitational force vector.

samarjeetkaur: I did refer to the pic earlier as well, but well just rotate the thing 90 deg anticlockwise. That's how my sensor is put, that gives me y-axis parallel to gravitational force vector.

Post the code and we'll see.