22231020321 has 10 divisors (see below), whose sum is σ = 33209302082. Its totient is φ = 14820680160.

The previous prime is 22231020283. The next prime is 22231020349. The reversal of 22231020321 is 12302013222.

It can be written as a sum of positive squares in only one way, i.e., 20593685025 + 1637335296 = 143505^2 + 40464^2 .

It is not a de Polignac number, because 22231020321 - 2¹⁸ = 22230758177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22231020294 and 22231020303.

It is not an unprimeable number, because it can be changed into a prime (22231020121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 137228440 + ... + 137228601.

Almost surely, 2^22231020321 is an apocalyptic number.

It is an amenable number.

22231020321 is a deficient number, since it is larger than the sum of its proper divisors (10978281761).

22231020321 is an equidigital number, since it uses as much as digits as its factorization.

22231020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274457053 (or 274457044 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 22231020321 its reverse (12302013222), we get a palindrome (34533033543).

The spelling of 22231020321 in words is "twenty-two billion, two hundred thirty-one million, twenty thousand, three hundred twenty-one".