100991101 has 4 divisors (see below), whose sum is σ = 106931772. Its totient is φ = 95050432.

The previous prime is 100991089. The next prime is 100991117. The reversal of 100991101 is 101199001.

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 56235001 + 44756100 = 7499^2 + 6690^2 .

It is a cyclic number.

It is not a de Polignac number, because 100991101 - 2⁵ = 100991069 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 (100991171) 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, 2970310 + ... + 2970343.

It is an arithmetic number, because the mean of its divisors is an integer number (26732943).

Almost surely, 2^100991101 is an apocalyptic number.

It is an amenable number.

100991101 is a deficient number, since it is larger than the sum of its proper divisors (5940671).

100991101 is an equidigital number, since it uses as much as digits as its factorization.

100991101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5940670.

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

The square root of 100991101 is about 10049.4328695703. The cubic root of 100991101 is about 465.6872729108.

The spelling of 100991101 in words is "one hundred million, nine hundred ninety-one thousand, one hundred one".