1011001

This number is a prime.

Largest known prime-indexed Fibonacci number written in base 2, read as decimal numbers which then is prime. 89 (a prime) is the 11th (a prime) Fibonacci number, 89 (base 2) = 1011001, and 1011001 (base 10) is prime. [Post]

The only prime less than a googol that is a concatenation in order of first k successive numbers of form 10^n+1, (k=2), case 101, 1001. [Loungrides]

The smallest prime such that the reversal of its cube is another cube: 1011001³ = 1033367397366033001 and 1003306637937633301 = 1001101³. [Gudipati]