122222111220 has 192 divisors, whose sum is σ = 415867334400. Its totient is φ = 29554398720.

The previous prime is 122222111183. The next prime is 122222111237. The reversal of 122222111220 is 22111222221.

It is a happy number.

122222111220 is a `hidden beast` number, since 1 + 222 + 221 + 1 + 1 + 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 = 122222111193 and 122222111202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2332266 + ... + 2384094.

It is an arithmetic number, because the mean of its divisors is an integer number (2165975700).

Almost surely, 2^122222111220 is an apocalyptic number.

122222111220 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 122222111220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207933667200).

122222111220 is an abundant number, since it is smaller than the sum of its proper divisors (293645223180).

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

122222111220 is a wasteful number, since it uses less digits than its factorization.

122222111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52255 (or 52247 counting only the distinct ones).

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

Adding to 122222111220 its reverse (22111222221), we get a palindrome (144333333441).

The spelling of 122222111220 in words is "one hundred twenty-two billion, two hundred twenty-two million, one hundred eleven thousand, two hundred twenty".