Rigidbody2D isKinematic effect by growing mass to huge number ?

Hey Guys, I a GameObject that has a Rigidbody2D on it and I want to be able to jump on it without it moves. So first thought I have was like, I'll check isKinematic, but then I realised that my OnTriggerEnter2D wasn't called anymore. So I sort of patched the problem by putting a huge mass on my rigidbody like 10000000, but I don't find this really clean. Does some one has an idea for this ? Thanks a lot for your time, Claude