21223320331201 has 2 divisors, whose sum is σ = 21223320331202. Its totient is φ = 21223320331200.

The previous prime is 21223320331117. The next prime is 21223320331247. The reversal of 21223320331201 is 10213302332212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16424377290000 + 4798943041201 = 4052700^2 + 2190649^2 .

It is a cyclic number.

It is not a de Polignac number, because 21223320331201 - 2³⁹ = 20673564517313 is a prime.

It is not a weakly prime, because it can be changed into another prime (21223320331261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611660165600 + 10611660165601.

It is an arithmetic number, because the mean of its divisors is an integer number (10611660165601).

Almost surely, 2^{21223320331201} is an apocalyptic number.

It is an amenable number.

21223320331201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223320331201 is an equidigital number, since it uses as much as digits as its factorization.

21223320331201 is an evil number, because the sum of its binary digits is even.

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

Adding to 21223320331201 its reverse (10213302332212), we get a palindrome (31436622663413).

The spelling of 21223320331201 in words is "twenty-one trillion, two hundred twenty-three billion, three hundred twenty million, three hundred thirty-one thousand, two hundred one".