Almost surely, 2121220111221032 is an apocalyptic number.
121220111221032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121220111221032 is a wasteful number, since it uses less digits than its factorization.
121220111221032 is an odious number, because the sum of its binary digits is odd.
Adding to 121220111221032 its reverse (230122111022121), we get a palindrome (351342222243153).
The spelling of 121220111221032 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, thirty-two".