321320332011 has 16 divisors (see below), whose sum is σ = 490406962688. Its totient is φ = 183320625600.

The previous prime is 321320332007. The next prime is 321320332049. The reversal of 321320332011 is 110233023123.

It is not a de Polignac number, because 321320332011 - 2² = 321320332007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321320332511) 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, 12111130 + ... + 12137631.

It is an arithmetic number, because the mean of its divisors is an integer number (30650435168).

Almost surely, 2^321320332011 is an apocalyptic number.

321320332011 is a deficient number, since it is larger than the sum of its proper divisors (169086630677).

321320332011 is a wasteful number, since it uses less digits than its factorization.

321320332011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24249402.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 321320332011 its reverse (110233023123), we get a palindrome (431553355134).

The spelling of 321320332011 in words is "three hundred twenty-one billion, three hundred twenty million, three hundred thirty-two thousand, eleven".