what is the 112 element?

It is called Copernicium since February 19, 2010.

"Copernicium is a synthetic radioactive chemical element with the symbol Cn and atomic number 112. The element was previously known by the IUPAC systematic element name ununbium (pronounced /uːnˈuːnbiəm/ ( listen) oon-OON-bee-əm), with the symbol Uub. It was first created in 1996 by the Gesellschaft für Schwerionenforschung (GSI).

Copernicium is currently the highest-numbered element to be officially recognised by the International Union of Pure and Applied Chemistry (IUPAC). The most stable isotope discovered to date is 285Cn with a half-life of ≈30 s, although evidence exists that 285Cn may have a nuclear isomer with a much longer half-life of 8.9 min. In total, about 75 atoms of copernicium have been detected using various nuclear reactions. Recent experiments suggest that copernicium behaves as a typical member of group 12, demonstrating properties consistent with a volatile metal."

"Naming:
After acknowledging their discovery, the IUPAC asked the discovery team at GSI to suggest a permanent name for ununbium. On 14 July 2009, they proposed copernicium with the element symbol Cp, after Nicolaus Copernicus "to honor an outstanding scientist, who changed our view of the world." IUPAC delayed the official recognition of the name, pending the results of a six-month discussion period among the scientific community.

Alternative spellings had been suggested to Hofmann, namely "copernicum", "copernium", and "kopernikium" (Kp), and Hofmann has said that the team had discussed the possibility of "copernicum" or "kopernikum", but that they had agreed on "copernicium" in order to comply with current IUPAC rules, which allow only the suffix -ium for new elements.

However, it was pointed out that the symbol Cp was previously associated with the name cassiopeium (cassiopium), now known as lutetium (Lu). Furthermore, the symbol Cp is also used in organometallic chemistry to denote the ligand cyclopentadiene. For this reason, the IUPAC disallowed the use of Cp as a future symbol, prompting the GSI team to put forward the symbol Cn as an alternative. On February 19, 2010, the 537th anniversary of Copernicus' birth, IUPAC officially accepted the proposed name and symbol."
Source and further information:
http://en.wikipedia.org/wiki/Copernicium