11,111

Number
$11 \, 111$ (eleven thousand, one hundred and eleven) is:


 * $41 \times 271$


 * The $5$th repuint after $1$, $11$, $111$, $1111$


 * The $19$th palindromic integer after $0$, $1$, $2$, $3$, $11$, $22$, $101$, $111$, $121$, $202$, $212$, $1001$, $1111$, $2002$, $10 \, 001$, $10 \, 101$, $10 \, 201$, $11 \, 011$ whose square is also palindromic integer
 * $11 \, 111^2 = 123 \, 454 \, 321$