321220850863 has 16 divisors (see below), whose sum is σ = 358094164896. Its totient is φ = 285658813440.

The previous prime is 321220850857. The next prime is 321220850893. The reversal of 321220850863 is 368058022123.

It is not a de Polignac number, because 321220850863 - 2⁹ = 321220850351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321220850893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621006 + ... + 1013947.

It is an arithmetic number, because the mean of its divisors is an integer number (22380885306).

Almost surely, 2^321220850863 is an apocalyptic number.

321220850863 is a deficient number, since it is larger than the sum of its proper divisors (36873314033).

321220850863 is a wasteful number, since it uses less digits than its factorization.

321220850863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635354.

The product of its (nonzero) digits is 138240, while the sum is 40.

Adding to 321220850863 its reverse (368058022123), we get a palindrome (689278872986).

The spelling of 321220850863 in words is "three hundred twenty-one billion, two hundred twenty million, eight hundred fifty thousand, eight hundred sixty-three".