321321131311 has 4 divisors (see below), whose sum is σ = 322084364824. Its totient is φ = 320557897800.

The previous prime is 321321131267. The next prime is 321321131359. The reversal of 321321131311 is 113131123123.

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 321321131311 - 2¹⁵ = 321321098543 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 (321321132311) 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, 381616125 + ... + 381616966.

It is an arithmetic number, because the mean of its divisors is an integer number (80521091206).

Almost surely, 2^321321131311 is an apocalyptic number.

321321131311 is a deficient number, since it is larger than the sum of its proper divisors (763233513).

321321131311 is an equidigital number, since it uses as much as digits as its factorization.

321321131311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763233512.

The product of its digits is 324, while the sum is 22.

Adding to 321321131311 its reverse (113131123123), we get a palindrome (434452254434).

The spelling of 321321131311 in words is "three hundred twenty-one billion, three hundred twenty-one million, one hundred thirty-one thousand, three hundred eleven".