21200233321 has 4 divisors (see below), whose sum is σ = 21202933972. Its totient is φ = 21197532672.

The previous prime is 21200233291. The next prime is 21200233343. The reversal of 21200233321 is 12333200212.

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 5276569600 + 15923663721 = 72640^2 + 126189^2 .

It is a cyclic number.

It is not a de Polignac number, because 21200233321 - 2¹³ = 21200225129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200233381) 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, 1338516 + ... + 1354261.

It is an arithmetic number, because the mean of its divisors is an integer number (5300733493).

Almost surely, 2^21200233321 is an apocalyptic number.

It is an amenable number.

21200233321 is a deficient number, since it is larger than the sum of its proper divisors (2700651).

21200233321 is an equidigital number, since it uses as much as digits as its factorization.

21200233321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2700650.

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

Adding to 21200233321 its reverse (12333200212), we get a palindrome (33533433533).

The spelling of 21200233321 in words is "twenty-one billion, two hundred million, two hundred thirty-three thousand, three hundred twenty-one".