122218220 has 24 divisors (see below), whose sum is σ = 258299664. Its totient is φ = 48574656.

The previous prime is 122218121. The next prime is 122218223. The reversal of 122218220 is 22812221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 122218192 and 122218201.

It is not an unprimeable number, because it can be changed into a prime (122218223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16322 + ... + 22601.

It is an arithmetic number, because the mean of its divisors is an integer number (10762486).

Almost surely, 2^122218220 is an apocalyptic number.

122218220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122218220 is an abundant number, since it is smaller than the sum of its proper divisors (136081444).

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

122218220 is a wasteful number, since it uses less digits than its factorization.

122218220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39089 (or 39087 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 122218220 is about 11055.2349590590. The cubic root of 122218220 is about 496.2631007461.

The spelling of 122218220 in words is "one hundred twenty-two million, two hundred eighteen thousand, two hundred twenty".