1111105815887 has 2 divisors, whose sum is σ = 1111105815888. Its totient is φ = 1111105815886.

The previous prime is 1111105815877. The next prime is 1111105815907. The reversal of 1111105815887 is 7885185011111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111105815887 - 2⁴ = 1111105815871 is a prime.

It is a super-2 number, since 2×1111105815887² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111105815847) 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 as a sum of consecutive naturals, namely, 555552907943 + 555552907944.

It is an arithmetic number, because the mean of its divisors is an integer number (555552907944).

Almost surely, 2^{1111105815887} is an apocalyptic number.

1111105815887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111105815887 is an equidigital number, since it uses as much as digits as its factorization.

1111105815887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 89600, while the sum is 47.

The spelling of 1111105815887 in words is "one trillion, one hundred eleven billion, one hundred five million, eight hundred fifteen thousand, eight hundred eighty-seven".