111321 has 32 divisors (see below), whose sum is σ = 204800. Its totient is φ = 58320.

The previous prime is 111317. The next prime is 111323. The reversal of 111321 is 123111.

It is not a de Polignac number, because 111321 - 2² = 111317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111323) 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, 3576 + ... + 3606.

It is an arithmetic number, because the mean of its divisors is an integer number (6400).

2¹¹¹³²¹ is an apocalyptic number.

It is an amenable number.

111321 is a deficient number, since it is larger than the sum of its proper divisors (93479).

111321 is a wasteful number, since it uses less digits than its factorization.

111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 60 counting only the distinct ones).

The product of its digits is 6, while the sum is 9.

The square root of 111321 is about 333.6480181269. The cubic root of 111321 is about 48.1052378521.

Adding to 111321 its reverse (123111), we get a palindrome (234432).

The spelling of 111321 in words is "one hundred eleven thousand, three hundred twenty-one", and thus it is an iban number.