111121321 has 8 divisors (see below), whose sum is σ = 114377600. Its totient is φ = 107911440.

The previous prime is 111121289. The next prime is 111121327. The reversal of 111121321 is 123121111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111121321 - 2⁵ = 111121289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111121327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6711 + ... + 16348.

It is an arithmetic number, because the mean of its divisors is an integer number (14297200).

Almost surely, 2^111121321 is an apocalyptic number.

It is an amenable number.

111121321 is a deficient number, since it is larger than the sum of its proper divisors (3256279).

111121321 is an equidigital number, since it uses as much as digits as its factorization.

111121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23199.

The product of its digits is 12, while the sum is 13.

The square root of 111121321 is about 10541.4098203229. The cubic root of 111121321 is about 480.7645815260.

Adding to 111121321 its reverse (123121111), we get a palindrome (234242432).

The spelling of 111121321 in words is "one hundred eleven million, one hundred twenty-one thousand, three hundred twenty-one".