100010001100991 has 2 divisors, whose sum is σ = 100010001100992. Its totient is φ = 100010001100990.

The previous prime is 100010001100943. The next prime is 100010001101011. The reversal of 100010001100991 is 199001100010001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100010001100991 - 2⁴² = 95611954589887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100010001700991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50005000550495 + 50005000550496.

It is an arithmetic number, because the mean of its divisors is an integer number (50005000550496).

Almost surely, 2^{100010001100991} is an apocalyptic number.

100010001100991 is a deficient number, since it is larger than the sum of its proper divisors (1).

100010001100991 is an equidigital number, since it uses as much as digits as its factorization.

100010001100991 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.

Adding to 100010001100991 its reverse (199001100010001), we get a palindrome (299011101110992).

The spelling of 100010001100991 in words is "one hundred trillion, ten billion, one million, one hundred thousand, nine hundred ninety-one".