The complement of this graph is the Kneser graph $\mathrm{K}(21,2)$.
| Number of vertices: | $210$ |
| Diameter: | $2$ |
| Intersection array: | $\{38,18;1,4\}$ |
| Spectrum: | $38^1 17^{20} (-2)^{189}$ |
| Automorphism group: | $\mathrm{S}_{21}$ |
| Distance-transitive: | Yes |
| Primitive |