Adding to 121230 its reverse (32121), we get a palindrome (153351).
It is a happy number.
It is an alternating number because its digits alternate between odd and even.
It is a congruent number.
It is an unprimeable number.
2121230 is an apocalyptic number.
121230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 121230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162000).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121230 is a wasteful number, since it uses less digits than its factorization.
121230 is an evil number, because the sum of its binary digits is even.
The square root of 121230 is about 348.1809874189. The cubic root of 121230 is about 49.4921934429.
The spelling of 121230 in words is "one hundred twenty-one thousand, two hundred thirty".