111020111987 has 2 divisors, whose sum is σ = 111020111988. Its totient is φ = 111020111986.

The previous prime is 111020111981. The next prime is 111020112011. The reversal of 111020111987 is 789111020111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111020111987 - 2¹⁰ = 111020110963 is a prime.

It is not a weakly prime, because it can be changed into another prime (111020111981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510055993 + 55510055994.

It is an arithmetic number, because the mean of its divisors is an integer number (55510055994).

Almost surely, 2^111020111987 is an apocalyptic number.

111020111987 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020111987 is an equidigital number, since it uses as much as digits as its factorization.

111020111987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 32.

The spelling of 111020111987 in words is "one hundred eleven billion, twenty million, one hundred eleven thousand, nine hundred eighty-seven".