21222332321 has 8 divisors (see below), whose sum is σ = 22341715200. Its totient is φ = 20103191280.

The previous prime is 21222332281. The next prime is 21222332371. The reversal of 21222332321 is 12323322212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222332321 is a prime.

It is a super-2 number, since 2×21222332321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222332371) 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, 136091 + ... + 246911.

It is an arithmetic number, because the mean of its divisors is an integer number (2792714400).

Almost surely, 2^21222332321 is an apocalyptic number.

It is an amenable number.

21222332321 is a deficient number, since it is larger than the sum of its proper divisors (1119382879).

21222332321 is a wasteful number, since it uses less digits than its factorization.

21222332321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120919.

The product of its digits is 1728, while the sum is 23.

Adding to 21222332321 its reverse (12323322212), we get a palindrome (33545654533).

The spelling of 21222332321 in words is "twenty-one billion, two hundred twenty-two million, three hundred thirty-two thousand, three hundred twenty-one".