22222121112220 has 24 divisors (see below), whose sum is σ = 46860091085808. Its totient is φ = 8851965254400.

The previous prime is 22222121112209. The next prime is 22222121112221. The reversal of 22222121112220 is 2221112122222.

It is a junction number, because it is equal to n+sod(n) for n = 22222121112191 and 22222121112200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222121112221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2305194466 + ... + 2305204105.

It is an arithmetic number, because the mean of its divisors is an integer number (1952503795242).

Almost surely, 2^{22222121112220} is an apocalyptic number.

22222121112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22222121112220 is an abundant number, since it is smaller than the sum of its proper divisors (24637969973588).

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

22222121112220 is a wasteful number, since it uses less digits than its factorization.

22222121112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4610398821 (or 4610398819 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 22222121112220 its reverse (2221112122222), we get a palindrome (24443233234442).

The spelling of 22222121112220 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty".