321071264891 has 4 divisors (see below), whose sum is σ = 345769054512. Its totient is φ = 296373475272.

The previous prime is 321071264867. The next prime is 321071264893. The reversal of 321071264891 is 198462170123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321071264891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321071264893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12348894791 + ... + 12348894816.

It is an arithmetic number, because the mean of its divisors is an integer number (86442263628).

Almost surely, 2^321071264891 is an apocalyptic number.

321071264891 is a deficient number, since it is larger than the sum of its proper divisors (24697789621).

321071264891 is a wasteful number, since it uses less digits than its factorization.

321071264891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24697789620.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 321071264891 in words is "three hundred twenty-one billion, seventy-one million, two hundred sixty-four thousand, eight hundred ninety-one".