121097218 has 16 divisors (see below), whose sum is σ = 200876256. Its totient is φ = 54289440.

The previous prime is 121097213. The next prime is 121097233. The reversal of 121097218 is 812790121.

It is a self number, because there is not a number n which added to its sum of digits gives 121097218.

It is not an unprimeable number, because it can be changed into a prime (121097213) 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, 36096 + ... + 39307.

It is an arithmetic number, because the mean of its divisors is an integer number (12554766).

Almost surely, 2^121097218 is an apocalyptic number.

121097218 is a deficient number, since it is larger than the sum of its proper divisors (79779038).

121097218 is a wasteful number, since it uses less digits than its factorization.

121097218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75489.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 121097218 is about 11004.4181127400. The cubic root of 121097218 is about 494.7411740787.

The spelling of 121097218 in words is "one hundred twenty-one million, ninety-seven thousand, two hundred eighteen".