1000110109991 has 2 divisors, whose sum is σ = 1000110109992. Its totient is φ = 1000110109990.

The previous prime is 1000110109969. The next prime is 1000110110023. The reversal of 1000110109991 is 1999010110001.

It is an a-pointer prime, because the next prime (1000110110023) can be obtained adding 1000110109991 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000110109991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000110109891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500055054995 + 500055054996.

It is an arithmetic number, because the mean of its divisors is an integer number (500055054996).

Almost surely, 2^{1000110109991} is an apocalyptic number.

1000110109991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000110109991 is an equidigital number, since it uses as much as digits as its factorization.

1000110109991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 32.

Adding to 1000110109991 its reverse (1999010110001), we get a palindrome (2999120219992).

The spelling of 1000110109991 in words is "one trillion, one hundred ten million, one hundred nine thousand, nine hundred ninety-one".