21122442203324 has 72 divisors (see below), whose sum is σ = 46449842632704. Its totient is φ = 8226796644000.

The previous prime is 21122442203321. The next prime is 21122442203339. The reversal of 21122442203324 is 42330224422112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122442203321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9210749 + ... + 11273099.

It is an arithmetic number, because the mean of its divisors is an integer number (645136703232).

Almost surely, 2^{21122442203324} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21122442203324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23224921316352).

21122442203324 is an abundant number, since it is smaller than the sum of its proper divisors (25327400429380).

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

21122442203324 is a wasteful number, since it uses less digits than its factorization.

21122442203324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065407 (or 2065394 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 21122442203324 its reverse (42330224422112), we get a palindrome (63452666625436).

The spelling of 21122442203324 in words is "twenty-one trillion, one hundred twenty-two billion, four hundred forty-two million, two hundred three thousand, three hundred twenty-four".