Formatting p value in scientific notation to conventional

Question

Ho do I get the conventional p value (in decimal places) when every time I get these scientific notations?

I tried format option but still get the same

> format(1.3e-12, width=5)
[1] "1.3e-12"

Answer 1

 format(1.3e-12, scientific=FALSE)
[1] "0.0000000000013"