21222322032 has 80 divisors (see below), whose sum is σ = 56821675680. Its totient is φ = 6817305600.

The previous prime is 21222322013. The next prime is 21222322067. The reversal of 21222322032 is 23022322212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 738982 + ... + 767162.

It is an arithmetic number, because the mean of its divisors is an integer number (710270946).

Almost surely, 2^21222322032 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 21222322032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28410837840).

21222322032 is an abundant number, since it is smaller than the sum of its proper divisors (35599353648).

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

21222322032 is a wasteful number, since it uses less digits than its factorization.

21222322032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28762 (or 28756 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21222322032 its reverse (23022322212), we get a palindrome (44244644244).

The spelling of 21222322032 in words is "twenty-one billion, two hundred twenty-two million, three hundred twenty-two thousand, thirty-two".