111232213231 has 4 divisors (see below), whose sum is σ = 111323164752. Its totient is φ = 111141261712.

The previous prime is 111232213207. The next prime is 111232213243. The reversal of 111232213231 is 132312232111.

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 111232213231 - 2⁵ = 111232213199 is a prime.

It is a super-2 number, since 2×111232213231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111232213271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45473926 + ... + 45476371.

It is an arithmetic number, because the mean of its divisors is an integer number (27830791188).

Almost surely, 2^111232213231 is an apocalyptic number.

111232213231 is a deficient number, since it is larger than the sum of its proper divisors (90951521).

111232213231 is an equidigital number, since it uses as much as digits as its factorization.

111232213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90951520.

The product of its digits is 432, while the sum is 22.

Adding to 111232213231 its reverse (132312232111), we get a palindrome (243544445342).

The spelling of 111232213231 in words is "one hundred eleven billion, two hundred thirty-two million, two hundred thirteen thousand, two hundred thirty-one".