0
Centi- is the SI prefix for 0.01.
The SI prefix "deca-" represents a multiple of ten.
The largest prefix in the SI system is "yotta-" denoting 10^24.
The SI prefix meaning of 0.001 is "milli-". This prefix denotes a factor of 1/1000, so 0.001 can be written as 1 milliunit.
The SI prefix for million is "Mega".