Yes it is.
the first seven Fibonacci numbers are 1,1,2,3,5,8,13. 13 is a Fibonacci number.
The 22nd Fibonacci number is 17,711
The 365th Fibonacci number is 8531073606282249384383143963212896619394786170594625964346924608389878465365.
The 100th Fibonacci number is 354,224,848,179,261,915,075.
The twelfth Fibonacci number is 144.
123 is not a Fibonacci number.
How to answer with formula
Yes - 5 is the fifth Fibonacci number.
The 16th number of the Fibonacci sequence is 987.
The 20th Fibonacci number in the sequence is 6,765.
Yes. 610 is the 15th number in the Fibonacci sequence.