21130223203321 has 2 divisors, whose sum is σ = 21130223203322. Its totient is φ = 21130223203320.

The previous prime is 21130223203301. The next prime is 21130223203337. The reversal of 21130223203321 is 12330232203112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21069835055721 + 60388147600 = 4590189^2 + 245740^2 .

It is a cyclic number.

It is not a de Polignac number, because 21130223203321 - 2²³ = 21130214814713 is a prime.

It is not a weakly prime, because it can be changed into another prime (21130223203301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565111601660 + 10565111601661.

It is an arithmetic number, because the mean of its divisors is an integer number (10565111601661).

Almost surely, 2^{21130223203321} is an apocalyptic number.

It is an amenable number.

21130223203321 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130223203321 is an equidigital number, since it uses as much as digits as its factorization.

21130223203321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21130223203321 its reverse (12330232203112), we get a palindrome (33460455406433).

The spelling of 21130223203321 in words is "twenty-one trillion, one hundred thirty billion, two hundred twenty-three million, two hundred three thousand, three hundred twenty-one".