111100111100971 has 2 divisors, whose sum is σ = 111100111100972. Its totient is φ = 111100111100970.

The previous prime is 111100111100941. The next prime is 111100111101029. The reversal of 111100111100971 is 179001111001111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111100111100971 - 2¹¹ = 111100111098923 is a prime.

It is not a weakly prime, because it can be changed into another prime (111100111100921) 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, 55550055550485 + 55550055550486.

It is an arithmetic number, because the mean of its divisors is an integer number (55550055550486).

Almost surely, 2^{111100111100971} is an apocalyptic number.

111100111100971 is a deficient number, since it is larger than the sum of its proper divisors (1).

111100111100971 is an equidigital number, since it uses as much as digits as its factorization.

111100111100971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63, while the sum is 25.

The spelling of 111100111100971 in words is "one hundred eleven trillion, one hundred billion, one hundred eleven million, one hundred thousand, nine hundred seventy-one".