Adding to 121210 its reverse (12121), we get a palindrome (133331).
121210 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.
It is an alternating number because its digits alternate between odd and even.
It is an unprimeable number.
2121210 is an apocalyptic number.
121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
121210 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.
121210 is a wasteful number, since it uses less digits than its factorization.
121210 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 78.
The square root of 121210 is about 348.1522655391. The cubic root of 121210 is about 49.4894716240.
The spelling of 121210 in words is "one hundred twenty-one thousand, two hundred ten", and thus it is an iban number.