111171115560959 has 2 divisors, whose sum is σ = 111171115560960. Its totient is φ = 111171115560958.

The previous prime is 111171115560913. The next prime is 111171115560971. The reversal of 111171115560959 is 959065511171111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111171115560959 - 2¹⁶ = 111171115495423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111171115560959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111171115560259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55585557780479 + 55585557780480.

It is an arithmetic number, because the mean of its divisors is an integer number (55585557780480).

Almost surely, 2^{111171115560959} is an apocalyptic number.

111171115560959 is a deficient number, since it is larger than the sum of its proper divisors (1).

111171115560959 is an equidigital number, since it uses as much as digits as its factorization.

111171115560959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 425250, while the sum is 53.

The spelling of 111171115560959 in words is "one hundred eleven trillion, one hundred seventy-one billion, one hundred fifteen million, five hundred sixty thousand, nine hundred fifty-nine".