111240434431 has 4 divisors (see below), whose sum is σ = 127131925072. Its totient is φ = 95348943792.

The previous prime is 111240434401. The next prime is 111240434447. The reversal of 111240434431 is 134434042111.

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 111240434431 - 2¹³ = 111240426239 is a prime.

It is a super-2 number, since 2×111240434431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111240434431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111240434401) 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, 7945745310 + ... + 7945745323.

It is an arithmetic number, because the mean of its divisors is an integer number (31782981268).

Almost surely, 2^111240434431 is an apocalyptic number.

111240434431 is a deficient number, since it is larger than the sum of its proper divisors (15891490641).

111240434431 is an equidigital number, since it uses as much as digits as its factorization.

111240434431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15891490640.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 111240434431 its reverse (134434042111), we get a palindrome (245674476542).

The spelling of 111240434431 in words is "one hundred eleven billion, two hundred forty million, four hundred thirty-four thousand, four hundred thirty-one".