321103305643 has 4 divisors (see below), whose sum is σ = 321163319088. Its totient is φ = 321043292200.

The previous prime is 321103305577. The next prime is 321103305659. The reversal of 321103305643 is 346503301123.

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

It is a cyclic number.

It is not a de Polignac number, because 321103305643 - 2²⁹ = 320566434731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321103305043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29998696 + ... + 30009397.

It is an arithmetic number, because the mean of its divisors is an integer number (80290829772).

Almost surely, 2^321103305643 is an apocalyptic number.

321103305643 is a deficient number, since it is larger than the sum of its proper divisors (60013445).

321103305643 is an equidigital number, since it uses as much as digits as its factorization.

321103305643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60013444.

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 321103305643 its reverse (346503301123), we get a palindrome (667606606766).

The spelling of 321103305643 in words is "three hundred twenty-one billion, one hundred three million, three hundred five thousand, six hundred forty-three".