Rudimental Tetration

201 1 201 1 2012 \large 2011^{2011^{2012}}

If the above number is in the form of x x x^x for some positve integer x x , how many positive factors does x x have (inclusive of 1 1 and itself)?

Details and Assumptions

  • No computational aids is required in solving this problem.

  • You may use the fact that 2011 2011 is prime.

Image Credit: Wikimedia TetrationConvergence


The answer is 2012.

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1 solution

201 1 201 1 2012 2011^{2011^{2012}} can be written as ( 201 1 2011 ) 201 1 2011 (2011^{2011})^{2011^{2011}}

Therefore x= 201 1 2011 2011^{2011} As 2011 is a prime number total number of factor is 2012

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