22211221122 has 96 divisors (see below), whose sum is σ = 51139670400. Its totient is φ = 6947576064.

The previous prime is 22211221111. The next prime is 22211221169. The reversal of 22211221122 is 22112211222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 22211221095 and 22211221104.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30551523 + ... + 30552249.

It is an arithmetic number, because the mean of its divisors is an integer number (532704900).

Almost surely, 2^22211221122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22211221122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25569835200).

22211221122 is an abundant number, since it is smaller than the sum of its proper divisors (28928449278).

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

22211221122 is a wasteful number, since it uses less digits than its factorization.

22211221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480 (or 1477 counting only the distinct ones).

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

Adding to 22211221122 its reverse (22112211222), we get a palindrome (44323432344).

It can be divided in two parts, 2 and 2211221122, that multiplied together give a palindrome (4422442244).

The spelling of 22211221122 in words is "twenty-two billion, two hundred eleven million, two hundred twenty-one thousand, one hundred twenty-two".