21320331334241 has 2 divisors, whose sum is σ = 21320331334242. Its totient is φ = 21320331334240.

The previous prime is 21320331334217. The next prime is 21320331334339. The reversal of 21320331334241 is 14243313302312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17836229103616 + 3484102230625 = 4223296^2 + 1866575^2 .

It is a cyclic number.

It is not a de Polignac number, because 21320331334241 - 2⁶ = 21320331334177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21320331334198 and 21320331334207.

It is not a weakly prime, because it can be changed into another prime (21320331334441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660165667120 + 10660165667121.

It is an arithmetic number, because the mean of its divisors is an integer number (10660165667121).

Almost surely, 2^{21320331334241} is an apocalyptic number.

It is an amenable number.

21320331334241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320331334241 is an equidigital number, since it uses as much as digits as its factorization.

21320331334241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 21320331334241 its reverse (14243313302312), we get a palindrome (35563644636553).

The spelling of 21320331334241 in words is "twenty-one trillion, three hundred twenty billion, three hundred thirty-one million, three hundred thirty-four thousand, two hundred forty-one".