Do 10 millipedes = 1 centipede?

For some reason, apparently my room has started drawing millipedes, as I have now found one in there on two days out of the last three. Thankfully, millipedes are about a thousand times less worrisome than centipedes, for several reasons:

• they aren't venomous.
• they don't bite.
• they're much smaller.
• they're much slower. 
• when disturbed, they don't go crazy and run around menacingly at top speed, but instead collapse and curl up into a little non-threatening ball that can then be safely picked up and disposed of.

Plus, I have yet to find one in my bed.