21330321311347 has 2 divisors, whose sum is σ = 21330321311348. Its totient is φ = 21330321311346.

The previous prime is 21330321311317. The next prime is 21330321311359. The reversal of 21330321311347 is 74311312303312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21330321311347 - 2⁷ = 21330321311219 is a prime.

It is not a weakly prime, because it can be changed into another prime (21330321311317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665160655673 + 10665160655674.

It is an arithmetic number, because the mean of its divisors is an integer number (10665160655674).

Almost surely, 2^{21330321311347} is an apocalyptic number.

21330321311347 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330321311347 is an equidigital number, since it uses as much as digits as its factorization.

21330321311347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 34.

Adding to 21330321311347 its reverse (74311312303312), we get a palindrome (95641633614659).

The spelling of 21330321311347 in words is "twenty-one trillion, three hundred thirty billion, three hundred twenty-one million, three hundred eleven thousand, three hundred forty-seven".