111344024561 has 24 divisors (see below), whose sum is σ = 146509337664. Its totient is φ = 82195158240.

The previous prime is 111344024543. The next prime is 111344024569. The reversal of 111344024561 is 165420443111.

It is not a de Polignac number, because 111344024561 - 2¹⁸ = 111343762417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111344024569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1975010 + ... + 2030603.

It is an arithmetic number, because the mean of its divisors is an integer number (6104555736).

Almost surely, 2^111344024561 is an apocalyptic number.

111344024561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111344024561 is a deficient number, since it is larger than the sum of its proper divisors (35165313103).

111344024561 is a wasteful number, since it uses less digits than its factorization.

111344024561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4005669 (or 4005650 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 111344024561 its reverse (165420443111), we get a palindrome (276764467672).

The spelling of 111344024561 in words is "one hundred eleven billion, three hundred forty-four million, twenty-four thousand, five hundred sixty-one".