111110999971 has 2 divisors, whose sum is σ = 111110999972. Its totient is φ = 111110999970.

The previous prime is 111110999953. The next prime is 111110999999. The reversal of 111110999971 is 179999011111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111110999971 - 2¹¹ = 111110997923 is a prime.

It is not a weakly prime, because it can be changed into another prime (111110999921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555499985 + 55555499986.

It is an arithmetic number, because the mean of its divisors is an integer number (55555499986).

Almost surely, 2^111110999971 is an apocalyptic number.

111110999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110999971 is an equidigital number, since it uses as much as digits as its factorization.

111110999971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 49.

The spelling of 111110999971 in words is "one hundred eleven billion, one hundred ten million, nine hundred ninety-nine thousand, nine hundred seventy-one".