21122222322 has 16 divisors (see below), whose sum is σ = 44729412192. Its totient is φ = 6626579520.

The previous prime is 21122222321. The next prime is 21122222327. The reversal of 21122222322 is 22322222112.

It is a super-2 number, since 2×21122222322² (a number of 21 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (21122222321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103540204 + ... + 103540407.

It is an arithmetic number, because the mean of its divisors is an integer number (2795588262).

Almost surely, 2^21122222322 is an apocalyptic number.

21122222322 is an abundant number, since it is smaller than the sum of its proper divisors (23607189870).

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

21122222322 is a wasteful number, since it uses less digits than its factorization.

21122222322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207080633.

The product of its digits is 768, while the sum is 21.

Adding to 21122222322 its reverse (22322222112), we get a palindrome (43444444434).

The spelling of 21122222322 in words is "twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, three hundred twenty-two".