111131615513 has 4 divisors (see below), whose sum is σ = 114716506368. Its totient is φ = 107546724660.

The previous prime is 111131615489. The next prime is 111131615629. The reversal of 111131615513 is 315516131111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111131615513 - 2¹⁸ = 111131353369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111131612513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1792445381 + ... + 1792445442.

It is an arithmetic number, because the mean of its divisors is an integer number (28679126592).

Almost surely, 2^111131615513 is an apocalyptic number.

It is an amenable number.

111131615513 is a deficient number, since it is larger than the sum of its proper divisors (3584890855).

111131615513 is an equidigital number, since it uses as much as digits as its factorization.

111131615513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584890854.

The product of its digits is 1350, while the sum is 29.

Adding to 111131615513 its reverse (315516131111), we get a palindrome (426647746624).

The spelling of 111131615513 in words is "one hundred eleven billion, one hundred thirty-one million, six hundred fifteen thousand, five hundred thirteen".