1100999999887 has 2 divisors, whose sum is σ = 1100999999888. Its totient is φ = 1100999999886.

The previous prime is 1100999999843. The next prime is 1100999999893. The reversal of 1100999999887 is 7889999990011.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100999999887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100999991887) 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, 550499999943 + 550499999944.

It is an arithmetic number, because the mean of its divisors is an integer number (550499999944).

Almost surely, 2^{1100999999887} is an apocalyptic number.

1100999999887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100999999887 is an equidigital number, since it uses as much as digits as its factorization.

1100999999887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238085568, while the sum is 79.

The spelling of 1100999999887 in words is "one trillion, one hundred billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred eighty-seven".