111312105 has 8 divisors (see below), whose sum is σ = 178099392. Its totient is φ = 59366448.

The previous prime is 111312101. The next prime is 111312109. The reversal of 111312105 is 501213111.

It is an interprime number because it is at equal distance from previous prime (111312101) and next prime (111312109).

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

It is not a de Polignac number, because 111312105 - 2² = 111312101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 7420807 = 111312105 / (1 + 1 + 1 + 3 + 1 + 2 + 1 + 0 + 5).

It is not an unprimeable number, because it can be changed into a prime (111312101) 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, 3710389 + ... + 3710418.

It is an arithmetic number, because the mean of its divisors is an integer number (22262424).

Almost surely, 2^111312105 is an apocalyptic number.

111312105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111312105 is a deficient number, since it is larger than the sum of its proper divisors (66787287).

111312105 is an equidigital number, since it uses as much as digits as its factorization.

111312105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7420815.

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 111312105 is about 10550.4552034498. The cubic root of 111312105 is about 481.0395655001.

Adding to 111312105 its reverse (501213111), we get a palindrome (612525216).

The spelling of 111312105 in words is "one hundred eleven million, three hundred twelve thousand, one hundred five".