22222122221112 has 128 divisors (see below), whose sum is σ = 61891274776320. Its totient is φ = 6592190976000.

The previous prime is 22222122221087. The next prime is 22222122221113. The reversal of 22222122221112 is 21112222122222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222122221113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128008 + ... + 6667880.

It is an arithmetic number, because the mean of its divisors is an integer number (483525584190).

Almost surely, 2^{22222122221112} is an apocalyptic number.

22222122221112 is a gapful number since it is divisible by the number (22) 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 22222122221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30945637388160).

22222122221112 is an abundant number, since it is smaller than the sum of its proper divisors (39669152555208).

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

22222122221112 is a wasteful number, since it uses less digits than its factorization.

22222122221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540165 (or 6540161 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

Adding to 22222122221112 its reverse (21112222122222), we get a palindrome (43334344343334).

The spelling of 22222122221112 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred twelve".