121223418 has 8 divisors (see below), whose sum is σ = 242446848. Its totient is φ = 40407804.

The previous prime is 121223411. The next prime is 121223419. The reversal of 121223418 is 814322121.

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

121223418 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121223411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10101946 + ... + 10101957.

It is an arithmetic number, because the mean of its divisors is an integer number (30305856).

Almost surely, 2^121223418 is an apocalyptic number.

121223418 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.

121223418 is a wasteful number, since it uses less digits than its factorization.

121223418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20203908.

The product of its digits is 768, while the sum is 24.

The square root of 121223418 is about 11010.1506801678. The cubic root of 121223418 is about 494.9129772538.

Adding to 121223418 its reverse (814322121), we get a palindrome (935545539).

The spelling of 121223418 in words is "one hundred twenty-one million, two hundred twenty-three thousand, four hundred eighteen".