111316321 has 4 divisors (see below), whose sum is σ = 111337492. Its totient is φ = 111295152.

The previous prime is 111316301. The next prime is 111316349. The reversal of 111316321 is 123613111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123613111 = 1049 ⋅117839.

It can be written as a sum of positive squares in 2 ways, for example, as 67240000 + 44076321 = 8200^2 + 6639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111316321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111316301) 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, 4015 + ... + 15451.

It is an arithmetic number, because the mean of its divisors is an integer number (27834373).

Almost surely, 2^111316321 is an apocalyptic number.

It is an amenable number.

111316321 is a deficient number, since it is larger than the sum of its proper divisors (21171).

111316321 is an equidigital number, since it uses as much as digits as its factorization.

111316321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21170.

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

The square root of 111316321 is about 10550.6550033635. The cubic root of 111316321 is about 481.0456386258.

Adding to 111316321 its reverse (123613111), we get a palindrome (234929432).

The spelling of 111316321 in words is "one hundred eleven million, three hundred sixteen thousand, three hundred twenty-one".