21313330320097 has 2 divisors, whose sum is σ = 21313330320098. Its totient is φ = 21313330320096.

The previous prime is 21313330319923. The next prime is 21313330320211. The reversal of 21313330320097 is 79002303331312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19933090693201 + 1380239626896 = 4464649^2 + 1174836^2 .

It is a cyclic number.

It is not a de Polignac number, because 21313330320097 - 2¹⁹ = 21313329795809 is a prime.

It is not a weakly prime, because it can be changed into another prime (21313330320497) 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, 10656665160048 + 10656665160049.

It is an arithmetic number, because the mean of its divisors is an integer number (10656665160049).

Almost surely, 2^{21313330320097} is an apocalyptic number.

It is an amenable number.

21313330320097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313330320097 is an equidigital number, since it uses as much as digits as its factorization.

21313330320097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 37.

The spelling of 21313330320097 in words is "twenty-one trillion, three hundred thirteen billion, three hundred thirty million, three hundred twenty thousand, ninety-seven".