113111321 has 4 divisors (see below), whose sum is σ = 114474192. Its totient is φ = 111748452.

The previous prime is 113111311. The next prime is 113111329. The reversal of 113111321 is 123111311.

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 a de Polignac number, because none of the positive numbers 2^k-113111321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 113111296 and 113111305.

It is not an unprimeable number, because it can be changed into a prime (113111329) 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, 681311 + ... + 681476.

It is an arithmetic number, because the mean of its divisors is an integer number (28618548).

Almost surely, 2^113111321 is an apocalyptic number.

It is an amenable number.

113111321 is a deficient number, since it is larger than the sum of its proper divisors (1362871).

113111321 is an equidigital number, since it uses as much as digits as its factorization.

113111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362870.

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

The square root of 113111321 is about 10635.3806231841. The cubic root of 113111321 is about 483.6175190681.

Adding to 113111321 its reverse (123111311), we get a palindrome (236222632).

The spelling of 113111321 in words is "one hundred thirteen million, one hundred eleven thousand, three hundred twenty-one".