321271996289 has 2 divisors, whose sum is σ = 321271996290. Its totient is φ = 321271996288.

The previous prime is 321271996277. The next prime is 321271996327. The reversal of 321271996289 is 982699172123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318753963889 + 2518032400 = 564583^2 + 50180^2 .

It is a cyclic number.

It is not a de Polignac number, because 321271996289 - 2¹² = 321271992193 is a prime.

It is not a weakly prime, because it can be changed into another prime (321271996219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160635998144 + 160635998145.

It is an arithmetic number, because the mean of its divisors is an integer number (160635998145).

Almost surely, 2^321271996289 is an apocalyptic number.

It is an amenable number.

321271996289 is a deficient number, since it is larger than the sum of its proper divisors (1).

321271996289 is an equidigital number, since it uses as much as digits as its factorization.

321271996289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The spelling of 321271996289 in words is "three hundred twenty-one billion, two hundred seventy-one million, nine hundred ninety-six thousand, two hundred eighty-nine".