111001199971 has 2 divisors, whose sum is σ = 111001199972. Its totient is φ = 111001199970.

The previous prime is 111001199941. The next prime is 111001200029. The reversal of 111001199971 is 179991100111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111001199971 - 2⁷ = 111001199843 is a prime.

It is not a weakly prime, because it can be changed into another prime (111001199941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500599985 + 55500599986.

It is an arithmetic number, because the mean of its divisors is an integer number (55500599986).

Almost surely, 2^111001199971 is an apocalyptic number.

111001199971 is a deficient number, since it is larger than the sum of its proper divisors (1).

111001199971 is an equidigital number, since it uses as much as digits as its factorization.

111001199971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 40.

The spelling of 111001199971 in words is "one hundred eleven billion, one million, one hundred ninety-nine thousand, nine hundred seventy-one".