101010000000991 has 2 divisors, whose sum is σ = 101010000000992. Its totient is φ = 101010000000990.

The previous prime is 101010000000979. The next prime is 101010000001007. The reversal of 101010000000991 is 199000000010101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101010000000991 - 2²⁵ = 101009966446559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101010000000901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50505000000495 + 50505000000496.

It is an arithmetic number, because the mean of its divisors is an integer number (50505000000496).

Almost surely, 2^{101010000000991} is an apocalyptic number.

101010000000991 is a deficient number, since it is larger than the sum of its proper divisors (1).

101010000000991 is an equidigital number, since it uses as much as digits as its factorization.

101010000000991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81, while the sum is 22.

The spelling of 101010000000991 in words is "one hundred one trillion, ten billion, nine hundred ninety-one", and thus it is an aban number.