111310321 has 8 divisors (see below), whose sum is σ = 113263488. Its totient is φ = 109389700.

The previous prime is 111310267. The next prime is 111310337. The reversal of 111310321 is 123013111.

It is not a de Polignac number, because 111310321 - 2⁷ = 111310193 is a prime.

It is a super-2 number, since 2×111310321² = 24779975122246082, which contains 22 as substring.

It is a hoax number, since the sum of its digits (13) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111310361) 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, 357756 + ... + 358066.

It is an arithmetic number, because the mean of its divisors is an integer number (14157936).

Almost surely, 2^111310321 is an apocalyptic number.

It is an amenable number.

111310321 is a deficient number, since it is larger than the sum of its proper divisors (1953167).

111310321 is an frugal number, since it uses more digits than its factorization.

111310321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 111310321 is about 10550.3706569959. The cubic root of 111310321 is about 481.0369956114.

Adding to 111310321 its reverse (123013111), we get a palindrome (234323432).

The spelling of 111310321 in words is "one hundred eleven million, three hundred ten thousand, three hundred twenty-one".