10000991101 has 4 divisors (see below), whose sum is σ = 10001195100. Its totient is φ = 10000787104.

The previous prime is 10000991083. The next prime is 10000991113. The reversal of 10000991101 is 10119900001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 923856025 + 9077135076 = 30395^2 + 95274^2 .

It is a cyclic number.

It is not a de Polignac number, because 10000991101 - 2⁷ = 10000990973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000991131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20895 + ... + 142963.

It is an arithmetic number, because the mean of its divisors is an integer number (2500298775).

Almost surely, 2^10000991101 is an apocalyptic number.

It is an amenable number.

10000991101 is a deficient number, since it is larger than the sum of its proper divisors (203999).

10000991101 is an equidigital number, since it uses as much as digits as its factorization.

10000991101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203998.

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

The spelling of 10000991101 in words is "ten billion, nine hundred ninety-one thousand, one hundred one".