21432221322 has 16 divisors (see below), whose sum is σ = 43380882720. Its totient is φ = 7058000432.

The previous prime is 21432221303. The next prime is 21432221413. The reversal of 21432221322 is 22312223412.

It is a super-2 number, since 2×21432221322² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21432221292 and 21432221301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21517797 + ... + 21518792.

It is an arithmetic number, because the mean of its divisors is an integer number (2711305170).

Almost surely, 2^21432221322 is an apocalyptic number.

21432221322 is an abundant number, since it is smaller than the sum of its proper divisors (21948661398).

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

21432221322 is a wasteful number, since it uses less digits than its factorization.

21432221322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43036677.

The product of its digits is 2304, while the sum is 24.

Adding to 21432221322 its reverse (22312223412), we get a palindrome (43744444734).

The spelling of 21432221322 in words is "twenty-one billion, four hundred thirty-two million, two hundred twenty-one thousand, three hundred twenty-two".