111321321 has 16 divisors (see below), whose sum is σ = 158171904. Its totient is φ = 69398784.

The previous prime is 111321319. The next prime is 111321383. The reversal of 111321321 is 123123111.

It is a happy number.

It is not a de Polignac number, because 111321321 - 2¹ = 111321319 is a prime.

It is a super-3 number, since 3×111321321³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111321321.

It is not an unprimeable number, because it can be changed into a prime (111321391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1056 + ... + 14958.

It is an arithmetic number, because the mean of its divisors is an integer number (9885744).

Almost surely, 2^111321321 is an apocalyptic number.

It is an amenable number.

111321321 is a deficient number, since it is larger than the sum of its proper divisors (46850583).

111321321 is a wasteful number, since it uses less digits than its factorization.

111321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14080.

The product of its digits is 36, while the sum is 15.

The square root of 111321321 is about 10550.8919528161. The cubic root of 111321321 is about 481.0528409005.

Adding to 111321321 its reverse (123123111), we get a palindrome (234444432).

The spelling of 111321321 in words is "one hundred eleven million, three hundred twenty-one thousand, three hundred twenty-one".