321330121019491 has 2 divisors, whose sum is σ = 321330121019492. Its totient is φ = 321330121019490.

The previous prime is 321330121019447. The next prime is 321330121019497. The reversal of 321330121019491 is 194910121033123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321330121019491 - 2⁴³ = 312534027997283 is a prime.

It is not a weakly prime, because it can be changed into another prime (321330121019497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160665060509745 + 160665060509746.

It is an arithmetic number, because the mean of its divisors is an integer number (160665060509746).

Almost surely, 2^{321330121019491} is an apocalyptic number.

321330121019491 is a deficient number, since it is larger than the sum of its proper divisors (1).

321330121019491 is an equidigital number, since it uses as much as digits as its factorization.

321330121019491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 321330121019491 in words is "three hundred twenty-one trillion, three hundred thirty billion, one hundred twenty-one million, nineteen thousand, four hundred ninety-one".