10100110009991 has 2 divisors, whose sum is σ = 10100110009992. Its totient is φ = 10100110009990.

The previous prime is 10100110009981. The next prime is 10100110010009. The reversal of 10100110009991 is 19990001100101.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10100110009991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10100110009981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050055004995 + 5050055004996.

It is an arithmetic number, because the mean of its divisors is an integer number (5050055004996).

Almost surely, 2^{10100110009991} is an apocalyptic number.

10100110009991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10100110009991 is an equidigital number, since it uses as much as digits as its factorization.

10100110009991 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 10100110009991 in words is "ten trillion, one hundred billion, one hundred ten million, nine thousand, nine hundred ninety-one".