1011

This number is a composite.

1011 in base b is prime for all b < 10 with the exception of b=7. [Necula]

The smallest reflectable invertible semiprime and also the smallest reflectable invertible emirpimes. [Capelle]

7^2 + 11^2 + 29^2 = 11^2 + 19^2 + 23^2 = 1011. Is this the smallest prime that is the sum of three primes squared? Is there a smaller one with six distinct primes squared? [Bergot]