111121313 has 4 divisors (see below), whose sum is σ = 112460208. Its totient is φ = 109782420.

The previous prime is 111121289. The next prime is 111121327. The reversal of 111121313 is 313121111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111121313 - 2⁸ = 111121057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111121343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669323 + ... + 669488.

It is an arithmetic number, because the mean of its divisors is an integer number (28115052).

Almost surely, 2^111121313 is an apocalyptic number.

It is an amenable number.

111121313 is a deficient number, since it is larger than the sum of its proper divisors (1338895).

111121313 is an equidigital number, since it uses as much as digits as its factorization.

111121313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338894.

The product of its digits is 18, while the sum is 14.

The square root of 111121313 is about 10541.4094408670. The cubic root of 111121313 is about 480.7645699887.

Adding to 111121313 its reverse (313121111), we get a palindrome (424242424).

The spelling of 111121313 in words is "one hundred eleven million, one hundred twenty-one thousand, three hundred thirteen".