10001009091 has 24 divisors (see below), whose sum is σ = 14039316144. Its totient is φ = 6328811520.

The previous prime is 10001009077. The next prime is 10001009113. The reversal of 10001009091 is 19090010001.

It is not a de Polignac number, because 10001009091 - 2⁵ = 10001009059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10001009021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138691 + ... + 198083.

It is an arithmetic number, because the mean of its divisors is an integer number (584971506).

Almost surely, 2^10001009091 is an apocalyptic number.

10001009091 is a deficient number, since it is larger than the sum of its proper divisors (4038307053).

10001009091 is an equidigital number, since it uses as much as digits as its factorization.

10001009091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59511 (or 59474 counting only the distinct ones).

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

Adding to 10001009091 its reverse (19090010001), we get a palindrome (29091019092).

The spelling of 10001009091 in words is "ten billion, one million, nine thousand, ninety-one".