111431041121 has 4 divisors (see below), whose sum is σ = 111874989744. Its totient is φ = 110987092500.

The previous prime is 111431041109. The next prime is 111431041129. The reversal of 111431041121 is 121140134111.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111431041121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111431041093 and 111431041102.

It is not an unprimeable number, because it can be changed into a prime (111431041129) 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, 221973935 + ... + 221974436.

It is an arithmetic number, because the mean of its divisors is an integer number (27968747436).

Almost surely, 2^111431041121 is an apocalyptic number.

It is an amenable number.

111431041121 is a deficient number, since it is larger than the sum of its proper divisors (443948623).

111431041121 is an equidigital number, since it uses as much as digits as its factorization.

111431041121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443948622.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 111431041121 its reverse (121140134111), we get a palindrome (232571175232).

The spelling of 111431041121 in words is "one hundred eleven billion, four hundred thirty-one million, forty-one thousand, one hundred twenty-one".