Adding to 121420 its reverse (24121), we get a palindrome (145541).
2121420 is an apocalyptic number.
121420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 121420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137592).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121420 is a wasteful number, since it uses less digits than its factorization.
121420 is an odious number, because the sum of its binary digits is odd.
The square root of 121420 is about 348.4537272006. The cubic root of 121420 is about 49.5180358043.
The spelling of 121420 in words is "one hundred twenty-one thousand, four hundred twenty", and thus it is an iban number.