22222121122110 has 256 divisors, whose sum is σ = 65788209414144. Its totient is φ = 4678100324352.

The previous prime is 22222121122057. The next prime is 22222121122147. The reversal of 22222121122110 is 1122112122222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2896141234 + ... + 2896148906.

It is an arithmetic number, because the mean of its divisors is an integer number (256985193024).

Almost surely, 2^{22222121122110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22222121122110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32894104707072).

22222121122110 is an abundant number, since it is smaller than the sum of its proper divisors (43566088292034).

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

22222121122110 is a wasteful number, since it uses less digits than its factorization.

22222121122110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9947.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22222121122110 its reverse (1122112122222), we get a palindrome (23344233244332).

The spelling of 22222121122110 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred ten".