111443331321 has 48 divisors (see below), whose sum is σ = 186634156800. Its totient is φ = 62761029120.

The previous prime is 111443331319. The next prime is 111443331347. The reversal of 111443331321 is 123133344111.

111443331321 is a `hidden beast` number, since 1 + 1 + 1 + 4 + 4 + 3 + 331 + 321 = 666.

It is not a de Polignac number, because 111443331321 - 2¹ = 111443331319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111443331361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6425341 + ... + 6442661.

It is an arithmetic number, because the mean of its divisors is an integer number (3888211600).

Almost surely, 2^111443331321 is an apocalyptic number.

It is an amenable number.

111443331321 is a deficient number, since it is larger than the sum of its proper divisors (75190825479).

111443331321 is a wasteful number, since it uses less digits than its factorization.

111443331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18806 (or 18803 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 111443331321 its reverse (123133344111), we get a palindrome (234576675432).

The spelling of 111443331321 in words is "one hundred eleven billion, four hundred forty-three million, three hundred thirty-one thousand, three hundred twenty-one".