2321993459521 has 2 divisors, whose sum is σ = 2321993459522. Its totient is φ = 2321993459520.

The previous prime is 2321993459483. The next prime is 2321993459531. The reversal of 2321993459521 is 1259543991232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2113057620496 + 208935839025 = 1453636^2 + 457095^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321993459521 - 2⁷ = 2321993459393 is a prime.

It is not a weakly prime, because it can be changed into another prime (2321993459531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160996729760 + 1160996729761.

It is an arithmetic number, because the mean of its divisors is an integer number (1160996729761).

Almost surely, 2^{2321993459521} is an apocalyptic number.

It is an amenable number.

2321993459521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321993459521 is an equidigital number, since it uses as much as digits as its factorization.

2321993459521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5248800, while the sum is 55.

The spelling of 2321993459521 in words is "two trillion, three hundred twenty-one billion, nine hundred ninety-three million, four hundred fifty-nine thousand, five hundred twenty-one".