111100109999971 has 2 divisors, whose sum is σ = 111100109999972. Its totient is φ = 111100109999970.

The previous prime is 111100109999959. The next prime is 111100110000041. The reversal of 111100109999971 is 179999901001111.

It is a weak prime.

It is an emirp because it is prime and its reverse (179999901001111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111100109999971 - 2⁷ = 111100109999843 is a prime.

It is not a weakly prime, because it can be changed into another prime (111100109999171) 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, 55550054999985 + 55550054999986.

It is an arithmetic number, because the mean of its divisors is an integer number (55550054999986).

Almost surely, 2^{111100109999971} is an apocalyptic number.

111100109999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

111100109999971 is an equidigital number, since it uses as much as digits as its factorization.

111100109999971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 413343, while the sum is 58.

The spelling of 111100109999971 in words is "one hundred eleven trillion, one hundred billion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred seventy-one".