122217220 has 12 divisors (see below), whose sum is σ = 256656204. Its totient is φ = 48886880.

The previous prime is 122217149. The next prime is 122217259. The reversal of 122217220 is 22712221.

It can be written as a sum of positive squares in 2 ways, for example, as 53260804 + 68956416 = 7298^2 + 8304^2 .

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, 3055411 + ... + 3055450.

It is an arithmetic number, because the mean of its divisors is an integer number (21388017).

Almost surely, 2^122217220 is an apocalyptic number.

122217220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122217220 is an abundant number, since it is smaller than the sum of its proper divisors (134438984).

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

122217220 is a wasteful number, since it uses less digits than its factorization.

122217220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6110870 (or 6110868 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 122217220 is about 11055.1897315243. The cubic root of 122217220 is about 496.2617472533.

Adding to 122217220 its reverse (22712221), we get a palindrome (144929441).

The spelling of 122217220 in words is "one hundred twenty-two million, two hundred seventeen thousand, two hundred twenty".