Question

what is 121.416 million means​

Answer 1

Let's start with a simple example:

If I say that the number of followers is 1.2k (where k stands for thousand) then I mean to say that the number of followers is 1.2 multiplied by 1000 = 1200 followers.

So, 121.416 million means that the exact number is 121.416 multiplied by 1,000,000 = 121,416,000