2122122222 has 96 divisors (see below), whose sum is σ = 5116535424. Its totient is φ = 630273600.

The previous prime is 2122122221. The next prime is 2122122271. The reversal of 2122122222 is 2222212212.

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 junction number, because it is equal to n+sod(n) for n = 2122122195 and 2122122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122122221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4603072 + ... + 4603532.

It is an arithmetic number, because the mean of its divisors is an integer number (53297244).

Almost surely, 2^2122122222 is an apocalyptic number.

2122122222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2122122222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2558267712).

2122122222 is an abundant number, since it is smaller than the sum of its proper divisors (2994413202).

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

2122122222 is a wasteful number, since it uses less digits than its factorization.

2122122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 891 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 2122122222 is about 46066.4978265116. The cubic root of 2122122222 is about 1285.0601741215.

Adding to 2122122222 its reverse (2222212212), we get a palindrome (4344334434).

The spelling of 2122122222 in words is "two billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-two".