21232120222321 has 2 divisors, whose sum is σ = 21232120222322. Its totient is φ = 21232120222320.

The previous prime is 21232120222289. The next prime is 21232120222351. The reversal of 21232120222321 is 12322202123212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19841456640625 + 1390663581696 = 4454375^2 + 1179264^2 .

It is a cyclic number.

It is not a de Polignac number, because 21232120222321 - 2⁵ = 21232120222289 is a prime.

It is a super-3 number, since 3×21232120222321³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21232120222351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616060111160 + 10616060111161.

It is an arithmetic number, because the mean of its divisors is an integer number (10616060111161).

Almost surely, 2^{21232120222321} is an apocalyptic number.

It is an amenable number.

21232120222321 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232120222321 is an equidigital number, since it uses as much as digits as its factorization.

21232120222321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21232120222321 its reverse (12322202123212), we get a palindrome (33554322345533).

The spelling of 21232120222321 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred twenty million, two hundred twenty-two thousand, three hundred twenty-one".