11011111100987 has 2 divisors, whose sum is σ = 11011111100988. Its totient is φ = 11011111100986.

The previous prime is 11011111100939. The next prime is 11011111101013. The reversal of 11011111100987 is 78900111111011.

11011111100987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (78900111111011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11011111100987 - 2¹⁶ = 11011111035451 is a prime.

It is not a weakly prime, because it can be changed into another prime (11011111102987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505555550493 + 5505555550494.

It is an arithmetic number, because the mean of its divisors is an integer number (5505555550494).

Almost surely, 2^{11011111100987} is an apocalyptic number.

11011111100987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011111100987 is an equidigital number, since it uses as much as digits as its factorization.

11011111100987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 32.

Adding to 11011111100987 its reverse (78900111111011), we get a palindrome (89911222211998).

The spelling of 11011111100987 in words is "eleven trillion, eleven billion, one hundred eleven million, one hundred thousand, nine hundred eighty-seven".