10000091091 has 4 divisors (see below), whose sum is σ = 13333454792. Its totient is φ = 6666727392.

The previous prime is 10000091081. The next prime is 10000091093. The reversal of 10000091091 is 19019000001.

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

It is not a de Polignac number, because 10000091091 - 2²⁷ = 9865873363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10000091093) 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, 1666681846 + ... + 1666681851.

It is an arithmetic number, because the mean of its divisors is an integer number (3333363698).

Almost surely, 2^10000091091 is an apocalyptic number.

10000091091 is a deficient number, since it is larger than the sum of its proper divisors (3333363701).

10000091091 is an equidigital number, since it uses as much as digits as its factorization.

10000091091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333363700.

The product of its (nonzero) digits is 81, while the sum is 21.

Adding to 10000091091 its reverse (19019000001), we get a palindrome (29019091092).

The spelling of 10000091091 in words is "ten billion, ninety-one thousand, ninety-one".