21200322337 has 2 divisors, whose sum is σ = 21200322338. Its totient is φ = 21200322336.

The previous prime is 21200322257. The next prime is 21200322343. The reversal of 21200322337 is 73322300212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21036891681 + 163430656 = 145041^2 + 12784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200322337 is a prime.

It is a super-2 number, since 2×21200322337² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21200322397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600161168 + 10600161169.

It is an arithmetic number, because the mean of its divisors is an integer number (10600161169).

Almost surely, 2^21200322337 is an apocalyptic number.

It is an amenable number.

21200322337 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200322337 is an equidigital number, since it uses as much as digits as its factorization.

21200322337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 25.

Adding to 21200322337 its reverse (73322300212), we get a palindrome (94522622549).

The spelling of 21200322337 in words is "twenty-one billion, two hundred million, three hundred twenty-two thousand, three hundred thirty-seven".