111143213 has 4 divisors (see below), whose sum is σ = 111234300. Its totient is φ = 111052128.

The previous prime is 111143209. The next prime is 111143237. The reversal of 111143213 is 312341111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73222249 + 37920964 = 8557^2 + 6158^2 .

It is a cyclic number.

It is not a de Polignac number, because 111143213 - 2² = 111143209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111143191 and 111143200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111143243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43688 + ... + 46161.

It is an arithmetic number, because the mean of its divisors is an integer number (27808575).

Almost surely, 2^111143213 is an apocalyptic number.

It is an amenable number.

111143213 is a deficient number, since it is larger than the sum of its proper divisors (91087).

111143213 is an equidigital number, since it uses as much as digits as its factorization.

111143213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91086.

The product of its digits is 72, while the sum is 17.

The square root of 111143213 is about 10542.4481502163. The cubic root of 111143213 is about 480.7961512465.

Adding to 111143213 its reverse (312341111), we get a palindrome (423484324).

The spelling of 111143213 in words is "one hundred eleven million, one hundred forty-three thousand, two hundred thirteen".