22001323321 has 4 divisors (see below), whose sum is σ = 22002884644. Its totient is φ = 21999762000.

The previous prime is 22001323319. The next prime is 22001323339. The reversal of 22001323321 is 12332310022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12332310022 = 2 ⋅6166155011.

It can be written as a sum of positive squares in 2 ways, for example, as 4942090000 + 17059233321 = 70300^2 + 130611^2 .

It is a cyclic number.

It is not a de Polignac number, because 22001323321 - 2¹ = 22001323319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22001353321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 759330 + ... + 787771.

It is an arithmetic number, because the mean of its divisors is an integer number (5500721161).

Almost surely, 2^22001323321 is an apocalyptic number.

It is an amenable number.

22001323321 is a deficient number, since it is larger than the sum of its proper divisors (1561323).

22001323321 is a wasteful number, since it uses less digits than its factorization.

22001323321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561322.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 22001323321 its reverse (12332310022), we get a palindrome (34333633343).

The spelling of 22001323321 in words is "twenty-two billion, one million, three hundred twenty-three thousand, three hundred twenty-one".