1009911000091 has 8 divisors (see below), whose sum is σ = 1204365913344. Its totient is φ = 828001565160.

The previous prime is 1009911000079. The next prime is 1009911000121. The reversal of 1009911000091 is 1900001199001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1009911000091 - 2¹³ = 1009910991899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1009911000001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3136369405 + ... + 3136369726.

It is an arithmetic number, because the mean of its divisors is an integer number (150545739168).

Almost surely, 2^{1009911000091} is an apocalyptic number.

1009911000091 is a deficient number, since it is larger than the sum of its proper divisors (194454913253).

1009911000091 is an equidigital number, since it uses as much as digits as its factorization.

1009911000091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6272739161.

The product of its (nonzero) digits is 729, while the sum is 31.

Adding to 1009911000091 its reverse (1900001199001), we get a palindrome (2909912199092).

The spelling of 1009911000091 in words is "one trillion, nine billion, nine hundred eleven million, ninety-one", and thus it is an aban number.