111101111987 has 2 divisors, whose sum is σ = 111101111988. Its totient is φ = 111101111986.

The previous prime is 111101111977. The next prime is 111101112029. The reversal of 111101111987 is 789111101111.

It is a weak prime.

It is an emirp because it is prime and its reverse (789111101111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111101111987 - 2⁴ = 111101111971 is a prime.

It is not a weakly prime, because it can be changed into another prime (111101111977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550555993 + 55550555994.

It is an arithmetic number, because the mean of its divisors is an integer number (55550555994).

Almost surely, 2^111101111987 is an apocalyptic number.

111101111987 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101111987 is an equidigital number, since it uses as much as digits as its factorization.

111101111987 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 111101111987 in words is "one hundred eleven billion, one hundred one million, one hundred eleven thousand, nine hundred eighty-seven".