110000010100991 has 2 divisors, whose sum is σ = 110000010100992. Its totient is φ = 110000010100990.

The previous prime is 110000010100961. The next prime is 110000010101039. The reversal of 110000010100991 is 199001010000011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110000010100991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110000010100961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55000005050495 + 55000005050496.

It is an arithmetic number, because the mean of its divisors is an integer number (55000005050496).

Almost surely, 2^{110000010100991} is an apocalyptic number.

110000010100991 is a deficient number, since it is larger than the sum of its proper divisors (1).

110000010100991 is an equidigital number, since it uses as much as digits as its factorization.

110000010100991 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 110000010100991 in words is "one hundred ten trillion, ten million, one hundred thousand, nine hundred ninety-one".