111,111,111,111,111,111

Number
$111 \, 111 \, 111 \, 111 \, 111 \, 111$ is:


 * $3^2 \times 7 \times 11 \times 13 \times 19 \times 37 \times 52 \, 579 \times 333 \, 667$


 * The $18$th repunit