How do you thirteen digit no without using calculator?

Answer 1

You cannot "do" numbers. You carry out specific operations on numbers and the answer to your question depends on which operator you want. Some operators require another number, such as addition, or subtraction, multiplication, division or exponentiation. Other operations do not: finding the additive inverse, the multiplicative inverse, the square, cube etc, square root, cube root etc, trigonometric or hyperbolic functions, logarithms and so on.