111021111119987 has 2 divisors, whose sum is σ = 111021111119988. Its totient is φ = 111021111119986.

The previous prime is 111021111119953. The next prime is 111021111120011. The reversal of 111021111119987 is 789911111120111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111021111119987 - 2¹² = 111021111115891 is a prime.

It is a super-2 number, since 2×111021111119987² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111021111113987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510555559993 + 55510555559994.

It is an arithmetic number, because the mean of its divisors is an integer number (55510555559994).

Almost surely, 2^{111021111119987} is an apocalyptic number.

111021111119987 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021111119987 is an equidigital number, since it uses as much as digits as its factorization.

111021111119987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 44.

The spelling of 111021111119987 in words is "one hundred eleven trillion, twenty-one billion, one hundred eleven million, one hundred nineteen thousand, nine hundred eighty-seven".