111436143121 has 4 divisors (see below), whose sum is σ = 111624063012. Its totient is φ = 111248223232.

The previous prime is 111436143101. The next prime is 111436143127. The reversal of 111436143121 is 121341634111.

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 78615748225 + 32820394896 = 280385^2 + 181164^2 .

It is a cyclic number.

It is not a de Polignac number, because 111436143121 - 2¹¹ = 111436141073 is a prime.

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 111436143121.

It is not an unprimeable number, because it can be changed into a prime (111436143127) 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, 93959056 + ... + 93960241.

It is an arithmetic number, because the mean of its divisors is an integer number (27906015753).

Almost surely, 2^111436143121 is an apocalyptic number.

It is an amenable number.

111436143121 is a deficient number, since it is larger than the sum of its proper divisors (187919891).

111436143121 is an equidigital number, since it uses as much as digits as its factorization.

111436143121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187919890.

The product of its digits is 1728, while the sum is 28.

Adding to 111436143121 its reverse (121341634111), we get a palindrome (232777777232).

The spelling of 111436143121 in words is "one hundred eleven billion, four hundred thirty-six million, one hundred forty-three thousand, one hundred twenty-one".