111131321 has 4 divisors (see below), whose sum is σ = 127007232. Its totient is φ = 95255412.

The previous prime is 111131309. The next prime is 111131327. The reversal of 111131321 is 123131111.

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 not a de Polignac number, because 111131321 - 2⁶ = 111131257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111131296 and 111131305.

It is not an unprimeable number, because it can be changed into a prime (111131327) 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, 7937945 + ... + 7937958.

It is an arithmetic number, because the mean of its divisors is an integer number (31751808).

Almost surely, 2^111131321 is an apocalyptic number.

It is an amenable number.

111131321 is a deficient number, since it is larger than the sum of its proper divisors (15875911).

111131321 is an equidigital number, since it uses as much as digits as its factorization.

111131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15875910.

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

The square root of 111131321 is about 10541.8841295093. The cubic root of 111131321 is about 480.7790027057.

Adding to 111131321 its reverse (123131111), we get a palindrome (234262432).

The spelling of 111131321 in words is "one hundred eleven million, one hundred thirty-one thousand, three hundred twenty-one".