110000110991 has 2 divisors, whose sum is σ = 110000110992. Its totient is φ = 110000110990.

The previous prime is 110000110949. The next prime is 110000111009. The reversal of 110000110991 is 199011000011.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110000110991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110000110921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55000055495 + 55000055496.

It is an arithmetic number, because the mean of its divisors is an integer number (55000055496).

Almost surely, 2^110000110991 is an apocalyptic number.

110000110991 is a deficient number, since it is larger than the sum of its proper divisors (1).

110000110991 is an equidigital number, since it uses as much as digits as its factorization.

110000110991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 23.

The spelling of 110000110991 in words is "one hundred ten billion, one hundred ten thousand, nine hundred ninety-one".