121000218 has 16 divisors (see below), whose sum is σ = 243626400. Its totient is φ = 40062416.

The previous prime is 121000213. The next prime is 121000261. The reversal of 121000218 is 812000121.

It is a junction number, because it is equal to n+sod(n) for n = 121000197 and 121000206.

It is not an unprimeable number, because it can be changed into a prime (121000211) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 66780 + ... + 68567.

It is an arithmetic number, because the mean of its divisors is an integer number (15226650).

Almost surely, 2^121000218 is an apocalyptic number.

121000218 is an abundant number, since it is smaller than the sum of its proper divisors (122626182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121000218 is a wasteful number, since it uses less digits than its factorization.

121000218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135501.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 121000218 is about 11000.0099090864. The cubic root of 121000218 is about 494.6090413625.

Adding to 121000218 its reverse (812000121), we get a palindrome (933000339).

The spelling of 121000218 in words is "one hundred twenty-one million, two hundred eighteen", and thus it is an aban number.