122217218 has 8 divisors (see below), whose sum is σ = 183407760. Its totient is φ = 61081300.

The previous prime is 122217149. The next prime is 122217259. The reversal of 122217218 is 812712221.

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

It is an unprimeable 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, 7508 + ... + 17343.

It is an arithmetic number, because the mean of its divisors is an integer number (22925970).

Almost surely, 2^122217218 is an apocalyptic number.

122217218 is a deficient number, since it is larger than the sum of its proper divisors (61190542).

122217218 is a wasteful number, since it uses less digits than its factorization.

122217218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27312.

The product of its digits is 896, while the sum is 26.

The square root of 122217218 is about 11055.1896410690. The cubic root of 122217218 is about 496.2617445463.

Adding to 122217218 its reverse (812712221), we get a palindrome (934929439).

The spelling of 122217218 in words is "one hundred twenty-two million, two hundred seventeen thousand, two hundred eighteen".