121/81
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| Ratio | 121/81 |
| Factorization | 3-4 × 112 |
| Monzo | [0 -4 0 0 2⟩ |
| Size in cents | 694.81588¢ |
| Name | Alpharabian narrow fifth |
| Color name | 1oo5, lolo 5th |
| FJS name | [math]\text{d5}^{11,11}[/math] |
| Special properties | reduced |
| Tenney height (log2 nd) | 13.2587 |
| Weil height (log2 max(n, d)) | 13.8377 |
| Wilson height (sopfr (nd)) | 34 |
| Harmonic entropy (Shannon, [math]\sqrt{nd}[/math]) |
~3.6023 bits |
| open this interval in xen-calc | |
121/81, the Alpharabian narrow fifth or lolo 5th (694.8¢), is a Lulu comma 243/242 (7.1¢) below the just fifth 3/2. It is the interval created by stacking two 11/9 neutral thirds, and can be considered a meantone fifth. It differs from the marvellous fifth 112/75 by 3025/3024. Since 38edo represents 11/9 near perfectly, it also represents this near perfectly as well.