121211206 has 8 divisors (see below), whose sum is σ = 182188584. Its totient is φ = 60481680.

The previous prime is 121211183. The next prime is 121211221. The reversal of 121211206 is 602112121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121211206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60735 + ... + 62698.

It is an arithmetic number, because the mean of its divisors is an integer number (22773573).

Almost surely, 2^121211206 is an apocalyptic number.

121211206 is a deficient number, since it is larger than the sum of its proper divisors (60977378).

121211206 is a wasteful number, since it uses less digits than its factorization.

121211206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123926.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 121211206 is about 11009.5960870506. The cubic root of 121211206 is about 494.8963575820.

Adding to 121211206 its reverse (602112121), we get a palindrome (723323327).

The spelling of 121211206 in words is "one hundred twenty-one million, two hundred eleven thousand, two hundred six".