22122211111220 has 24 divisors (see below), whose sum is σ = 50679974546208. Its totient is φ = 8044440404000.

The previous prime is 22122211111213. The next prime is 22122211111417. The reversal of 22122211111220 is 2211111222122.

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 = 22122211111192 and 22122211111201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50277752306 + ... + 50277752745.

It is an arithmetic number, because the mean of its divisors is an integer number (2111665606092).

Almost surely, 2^{22122211111220} is an apocalyptic number.

22122211111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22122211111220 is an abundant number, since it is smaller than the sum of its proper divisors (28557763434988).

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

22122211111220 is a wasteful number, since it uses less digits than its factorization.

22122211111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100555505071 (or 100555505069 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22122211111220 its reverse (2211111222122), we get a palindrome (24333322333342).

The spelling of 22122211111220 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred eleven million, one hundred eleven thousand, two hundred twenty".