121206 has 8 divisors (see below), whose sum is σ = 242424. Its totient is φ = 40400.

The previous prime is 121189. The next prime is 121229. The reversal of 121206 is 602121.

It is a sphenic number, since it is the product of 3 distinct primes.

121206 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121191 and 121200.

It is a congruent number.

It is an unprimeable number.

121206 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10095 + ... + 10106.

It is an arithmetic number, because the mean of its divisors is an integer number (30303).

2¹²¹²⁰⁶ is an apocalyptic number.

121206 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.

121206 is a wasteful number, since it uses less digits than its factorization.

121206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20206.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121206 is about 348.1465208788. The cubic root of 121206 is about 49.4889272243.

Adding to 121206 its reverse (602121), we get a palindrome (723327).

The spelling of 121206 in words is "one hundred twenty-one thousand, two hundred six".