111171115560961 has 4 divisors (see below), whose sum is σ = 112019750031024. Its totient is φ = 110322481090900.

The previous prime is 111171115560959. The next prime is 111171115560971. The reversal of 111171115560961 is 169065511171111.

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 111171115560961 - 2¹ = 111171115560959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111171115560971) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 424317234835 + ... + 424317235096.

It is an arithmetic number, because the mean of its divisors is an integer number (28004937507756).

Almost surely, 2^{111171115560961} is an apocalyptic number.

It is an amenable number.

111171115560961 is a deficient number, since it is larger than the sum of its proper divisors (848634470063).

111171115560961 is an equidigital number, since it uses as much as digits as its factorization.

111171115560961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848634470062.

The product of its (nonzero) digits is 56700, while the sum is 46.

The spelling of 111171115560961 in words is "one hundred eleven trillion, one hundred seventy-one billion, one hundred fifteen million, five hundred sixty thousand, nine hundred sixty-one".