111401605205 has 16 divisors (see below), whose sum is σ = 145879272000. Its totient is φ = 80994658560.

The previous prime is 111401605199. The next prime is 111401605283. The reversal of 111401605205 is 502506104111.

It is not a de Polignac number, because 111401605205 - 2¹⁸ = 111401343061 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 125540 + ... + 488429.

It is an arithmetic number, because the mean of its divisors is an integer number (9117454500).

Almost surely, 2^111401605205 is an apocalyptic number.

It is an amenable number.

111401605205 is a deficient number, since it is larger than the sum of its proper divisors (34477666795).

111401605205 is a wasteful number, since it uses less digits than its factorization.

111401605205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617284.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 111401605205 its reverse (502506104111), we get a palindrome (613907709316).

The spelling of 111401605205 in words is "one hundred eleven billion, four hundred one million, six hundred five thousand, two hundred five".