321943894271 has 2 divisors, whose sum is σ = 321943894272. Its totient is φ = 321943894270.

The previous prime is 321943894267. The next prime is 321943894343. The reversal of 321943894271 is 172498349123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321943894271 - 2² = 321943894267 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321943894231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160971947135 + 160971947136.

It is an arithmetic number, because the mean of its divisors is an integer number (160971947136).

Almost surely, 2^321943894271 is an apocalyptic number.

321943894271 is a deficient number, since it is larger than the sum of its proper divisors (1).

321943894271 is an equidigital number, since it uses as much as digits as its factorization.

321943894271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 53.

The spelling of 321943894271 in words is "three hundred twenty-one billion, nine hundred forty-three million, eight hundred ninety-four thousand, two hundred seventy-one".