122212220 has 96 divisors (see below), whose sum is σ = 288223488. Its totient is φ = 43241472.

The previous prime is 122212213. The next prime is 122212247. The reversal of 122212220 is 22212221.

It is a junction number, because it is equal to n+sod(n) for n = 122212195 and 122212204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 891992 + ... + 892128.

It is an arithmetic number, because the mean of its divisors is an integer number (3002328).

Almost surely, 2^122212220 is an apocalyptic number.

122212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144111744).

122212220 is an abundant number, since it is smaller than the sum of its proper divisors (166011268).

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

122212220 is a wasteful number, since it uses less digits than its factorization.

122212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 122212220 is about 11054.9635910753. The cubic root of 122212220 is about 496.2549796783.

Adding to 122212220 its reverse (22212221), we get a palindrome (144424441).

Subtracting from 122212220 its reverse (22212221), we obtain a palindrome (99999999).

It can be divided in two parts, 12221 and 2220, that added together give a palindrome (14441).

The spelling of 122212220 in words is "one hundred twenty-two million, two hundred twelve thousand, two hundred twenty".