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We present extensive optical ($UBVRI$, $g'r'i'z'$, and open CCD) andnear-infrared ($ZYJH$) photometry for the very nearby Type IIP SN ~2013ejextending from +1 to +461 days after shock breakout, estimated to be MJD$56496.9\pm0.3$. Substantial time series ultraviolet and optical spectroscopyobtained from +8 to +135 days are also presented. Considering well-observed SNeIIP from the literature, we derive $UBVRIJHK$ bolometric calibrations from$UBVRI$ and unfiltered measurements that potentially reach 2\% precision with a$B-V$ color-dependent correction. We observe moderately strong Si II$\lambda6355$ as early as +8 days. The photospheric velocity ($v_{\rm ph}$) isdetermined by modeling the spectra in the vicinity of Fe II $\lambda5169$whenever observed, and interpolating at photometric epochs based on asemianalytic method. This gives $v_{\rm ph} = 4500\pm500$ km s$^{-1}$ at +50days. We also observe spectral homogeneity of ultraviolet spectra at +10--12days for SNe IIP, while variations are evident a week after explosion. Usingthe expanding photosphere method, from combined analysis of SN 2013ej and SN2002ap, we estimate the distance to the host galaxy to be $9.0_{-0.6}^{+0.4}$Mpc, consistent with distance estimates from other methods. Photometric andspectroscopic analysis during the plateau phase, which we estimated to be$94\pm7$ days long, yields an explosion energy of $0.9\pm0.3\times10^{51}$ergs, a final pre-explosion progenitor mass of $15.2\pm4.2$~M$_\odot$ and aradius of $250\pm70$~R$_\odot$. We observe a broken exponential profile beyond+120 days, with a break point at +$183\pm16$ days. Measurements beyond thisbreak time yield a $^{56}$Ni mass of $0.013\pm0.001$~M$_\odot$.

Extensive Spectroscopy and Photometry of the Type IIP Supernova 2013ej