111243433021423 has 4 divisors (see below), whose sum is σ = 111594358677960. Its totient is φ = 110892507364888.

The previous prime is 111243433021381. The next prime is 111243433021433. The reversal of 111243433021423 is 324120334342111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111243433021423 - 2⁹ = 111243433020911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111243433021433) 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, 175462827793 + ... + 175462828426.

It is an arithmetic number, because the mean of its divisors is an integer number (27898589669490).

Almost surely, 2^{111243433021423} is an apocalyptic number.

111243433021423 is a deficient number, since it is larger than the sum of its proper divisors (350925656537).

111243433021423 is an equidigital number, since it uses as much as digits as its factorization.

111243433021423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350925656536.

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 111243433021423 its reverse (324120334342111), we get a palindrome (435363767363534).

The spelling of 111243433021423 in words is "one hundred eleven trillion, two hundred forty-three billion, four hundred thirty-three million, twenty-one thousand, four hundred twenty-three".