321131320111 has 4 divisors (see below), whose sum is σ = 367007222992. Its totient is φ = 275255417232.

The previous prime is 321131320049. The next prime is 321131320127. The reversal of 321131320111 is 111023131123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111023131123 = 17 ⋅6530772419.

It is a cyclic number.

It is not a de Polignac number, because 321131320111 - 2¹¹ = 321131318063 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 (321131321111) 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, 22937951430 + ... + 22937951443.

It is an arithmetic number, because the mean of its divisors is an integer number (91751805748).

Almost surely, 2^321131320111 is an apocalyptic number.

321131320111 is a deficient number, since it is larger than the sum of its proper divisors (45875902881).

321131320111 is an equidigital number, since it uses as much as digits as its factorization.

321131320111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45875902880.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 321131320111 its reverse (111023131123), we get a palindrome (432154451234).

The spelling of 321131320111 in words is "three hundred twenty-one billion, one hundred thirty-one million, three hundred twenty thousand, one hundred eleven".