22131044321 has 4 divisors (see below), whose sum is σ = 22729180692. Its totient is φ = 21532907952.

The previous prime is 22131044293. The next prime is 22131044339. The reversal of 22131044321 is 12344013122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13017669025 + 9113375296 = 114095^2 + 95464^2 .

It is a cyclic number.

It is not a de Polignac number, because 22131044321 - 2²² = 22126850017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22131046321) 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, 299068130 + ... + 299068203.

It is an arithmetic number, because the mean of its divisors is an integer number (5682295173).

Almost surely, 2^22131044321 is an apocalyptic number.

It is an amenable number.

22131044321 is a deficient number, since it is larger than the sum of its proper divisors (598136371).

22131044321 is an equidigital number, since it uses as much as digits as its factorization.

22131044321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598136370.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 22131044321 its reverse (12344013122), we get a palindrome (34475057443).

The spelling of 22131044321 in words is "twenty-two billion, one hundred thirty-one million, forty-four thousand, three hundred twenty-one".