111601510427 has 16 divisors (see below), whose sum is σ = 129240165600. Its totient is φ = 95242391040.

The previous prime is 111601510417. The next prime is 111601510439. The reversal of 111601510427 is 724015106111.

It is a cyclic number.

It is not a de Polignac number, because 111601510427 - 2¹⁰ = 111601509403 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 111601510427.

It is not an unprimeable number, because it can be changed into a prime (111601510417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 694352 + ... + 839837.

It is an arithmetic number, because the mean of its divisors is an integer number (8077510350).

Almost surely, 2^111601510427 is an apocalyptic number.

111601510427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

111601510427 is a deficient number, since it is larger than the sum of its proper divisors (17638655173).

111601510427 is a wasteful number, since it uses less digits than its factorization.

111601510427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534606.

The product of its (nonzero) digits is 1680, while the sum is 29.

Adding to 111601510427 its reverse (724015106111), we get a palindrome (835616616538).

The spelling of 111601510427 in words is "one hundred eleven billion, six hundred one million, five hundred ten thousand, four hundred twenty-seven".