Characteristic polynomial
$$\begin{equation}\left(\lambda + 1\right)^{2} \left(\lambda^{11} + 5 \lambda^{10} - 33 \lambda^{9} - 239 \lambda^{8} - 2319 \lambda^{7} - 13954 \lambda^{6} - 33962 \lambda^{5} - 167750 \lambda^{4} - 272381 \lambda^{3} - 750360 \lambda^{2} - 877724 \lambda - 356963\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 1\right) \left(\lambda^{11} + 5 \lambda^{10} - 33 \lambda^{9} - 239 \lambda^{8} - 2319 \lambda^{7} - 13954 \lambda^{6} - 33962 \lambda^{5} - 167750 \lambda^{4} - 272381 \lambda^{3} - 750360 \lambda^{2} - 877724 \lambda - 356963\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 2 & 2 & 2 & 0 & 0 & 0 & 3 & 3 & 12 & 12 & 4 & 5 \\ 1 & -1 & 0 & 1 & 2 & 0 & 0 & 0 & 2 & 3 & 0 & 0 & 0 \\ 2 & 0 & 0 & 1 & 2 & 4 & 2 & 2 & 0 & 0 & 0 & 0 & 4 \\ 1 & 1 & 0 & -1 & 0 & 0 & 0 & 2 & 2 & 0 & 3 & 0 & 4 \\ 0 & 2 & 1 & 0 & -1 & 1 & -1 & 1 & 0 & 0 & 0 & 0 & 0 \\ 0 & 1 & 0 & 2 & 0 & -1 & 0 & 0 & 0 & 2 & 2 & 0 & 0 \\ 0 & 1 & 0 & 0 & 0 & 1 & 0 & 0 & 0 & 0 & 2 & 0 & 3 \\ 0 & 0 & 1 & 2 & 1 & 0 & 1 & -1 & 0 & 0 & 0 & 0 & 0 \\ 0 & 0 & 2 & 0 & 0 & 0 & 0 & 1 & 0 & 4 & 2 & 2 & 0 \\ 0 & 0 & 0 & 0 & 0 & 2 & -2 & 6 & 4 & -2 & 2 & -1 & 2 \\ 0 & 0 & 0 & 0 & 3 & 0 & 2 & 0 & 1 & 2 & -1 & 1 & 0 \\ 0 & 0 & 0 & 0 & 2 & 2 & 5 & -6 & -7 & 2 & -3 & 1 & -2 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 6 & 5 & 2 & 0\end{pmatrix}\notag\end{equation}$$