23200221321 has 6 divisors (see below), whose sum is σ = 33511430810. Its totient is φ = 15466814208.

The previous prime is 23200221311. The next prime is 23200221349. The reversal of 23200221321 is 12312200232.

23200221321 is a `hidden beast` number, since 2 + 320 + 0 + 2 + 21 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13510575225 + 9689646096 = 116235^2 + 98436^2 .

It is not a de Polignac number, because 23200221321 - 2⁷ = 23200221193 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 = 23200221294 and 23200221303.

It is not an unprimeable number, because it can be changed into a prime (23200221311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1288901176 + ... + 1288901193.

Almost surely, 2^23200221321 is an apocalyptic number.

It is an amenable number.

23200221321 is a deficient number, since it is larger than the sum of its proper divisors (10311209489).

23200221321 is a wasteful number, since it uses less digits than its factorization.

23200221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577802375 (or 2577802372 counting only the distinct ones).

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

Adding to 23200221321 its reverse (12312200232), we get a palindrome (35512421553).

The spelling of 23200221321 in words is "twenty-three billion, two hundred million, two hundred twenty-one thousand, three hundred twenty-one".