11111011111087 has 2 divisors, whose sum is σ = 11111011111088. Its totient is φ = 11111011111086.

The previous prime is 11111011111061. The next prime is 11111011111127. The reversal of 11111011111087 is 78011111011111.

It is a weak prime.

It is an emirp because it is prime and its reverse (78011111011111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11111011111087 - 2³¹ = 11108863627439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111011111787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555505555543 + 5555505555544.

It is an arithmetic number, because the mean of its divisors is an integer number (5555505555544).

Almost surely, 2^{11111011111087} is an apocalyptic number.

11111011111087 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111011111087 is an equidigital number, since it uses as much as digits as its factorization.

11111011111087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 25.

Adding to 11111011111087 its reverse (78011111011111), we get a palindrome (89122122122198).

The spelling of 11111011111087 in words is "eleven trillion, one hundred eleven billion, eleven million, one hundred eleven thousand, eighty-seven".