111344042521 has 16 divisors (see below), whose sum is σ = 118224126720. Its totient is φ = 104644133440.

The previous prime is 111344042483. The next prime is 111344042533. The reversal of 111344042521 is 125240443111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111344042521 - 2¹⁵ = 111344009753 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 111344042521.

It is not an unprimeable number, because it can be changed into a prime (111344042581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 362115 + ... + 594823.

It is an arithmetic number, because the mean of its divisors is an integer number (7389007920).

Almost surely, 2^111344042521 is an apocalyptic number.

It is an amenable number.

111344042521 is a deficient number, since it is larger than the sum of its proper divisors (6880084199).

111344042521 is a wasteful number, since it uses less digits than its factorization.

111344042521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233096.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 111344042521 its reverse (125240443111), we get a palindrome (236584485632).

The spelling of 111344042521 in words is "one hundred eleven billion, three hundred forty-four million, forty-two thousand, five hundred twenty-one".