122212112220 has 144 divisors (see below), whose sum is σ = 415341265248. Its totient is φ = 28826426880.

The previous prime is 122212112219. The next prime is 122212112233. The reversal of 122212112220 is 22211212221.

It is a happy number.

122212112220 is a `hidden beast` number, since 12 + 221 + 211 + 2 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 122212112193 and 122212112202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 760839 + ... + 907358.

It is an arithmetic number, because the mean of its divisors is an integer number (2884314342).

Almost surely, 2^122212112220 is an apocalyptic number.

122212112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122212112220 is an abundant number, since it is smaller than the sum of its proper divisors (293129153028).

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

122212112220 is a wasteful number, since it uses less digits than its factorization.

122212112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668260 (or 1668255 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 122212112220 its reverse (22211212221), we get a palindrome (144423324441).

It can be divided in two parts, 122212 and 112220, that added together give a palindrome (234432).

The spelling of 122212112220 in words is "one hundred twenty-two billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty".