21232211322 has 64 divisors (see below), whose sum is σ = 50691962880. Its totient is φ = 5800261824.

The previous prime is 21232211309. The next prime is 21232211323. The reversal of 21232211322 is 22311223212.

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

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 (21232211323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40833 + ... + 210075.

It is an arithmetic number, because the mean of its divisors is an integer number (792061920).

Almost surely, 2^21232211322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21232211322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25345981440).

21232211322 is an abundant number, since it is smaller than the sum of its proper divisors (29459751558).

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

21232211322 is a wasteful number, since it uses less digits than its factorization.

21232211322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169387.

The product of its digits is 576, while the sum is 21.

Adding to 21232211322 its reverse (22311223212), we get a palindrome (43543434534).

The spelling of 21232211322 in words is "twenty-one billion, two hundred thirty-two million, two hundred eleven thousand, three hundred twenty-two".