Adding to 121772 its reverse (277121), we get a palindrome (398893).
121772 is an admirable number.
It is a nude number because it is divisible by every one of its digits.
It is an unprimeable number.
2121772 is an apocalyptic number.
It is an amenable number.
121772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121772 is a wasteful number, since it uses less digits than its factorization.
121772 is an odious number, because the sum of its binary digits is odd.
The square root of 121772 is about 348.9584502487. The cubic root of 121772 is about 49.5658410313.
The spelling of 121772 in words is "one hundred twenty-one thousand, seven hundred seventy-two", and thus it is an iban number.