111111111

This number is a composite.

The smallest repdigit number that is not square-free in its prime factorization. [Patterson]

Subtracting from the repunit prime R9 the sum of all of its truncations plus 2, i.e., 111111111-(11111111+1111111+111111+11111+1111+111+11+1+2), we find the largest zeroless prime with distinct digits, i.e., 98765431. [Loungrides]