321111320111 has 32 divisors (see below), whose sum is σ = 357071989248. Its totient is φ = 287415889920.

The previous prime is 321111320093. The next prime is 321111320141. The reversal of 321111320111 is 111023111123.

It is a de Polignac number, because none of the positive numbers 2^k-321111320111 is a prime.

It is a super-2 number, since 2×321111320111² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321111320111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321111320141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10641401 + ... + 10671533.

It is an arithmetic number, because the mean of its divisors is an integer number (11158499664).

Almost surely, 2^321111320111 is an apocalyptic number.

321111320111 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

321111320111 is a deficient number, since it is larger than the sum of its proper divisors (35960669137).

321111320111 is a wasteful number, since it uses less digits than its factorization.

321111320111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30531.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 321111320111 its reverse (111023111123), we get a palindrome (432134431234).

The spelling of 321111320111 in words is "three hundred twenty-one billion, one hundred eleven million, three hundred twenty thousand, one hundred eleven".