11091091001 has 4 divisors (see below), whose sum is σ = 11097217104. Its totient is φ = 11084964900.

The previous prime is 11091090991. The next prime is 11091091013. The reversal of 11091091001 is 10019019011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10019019011 = 409 ⋅24496379.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11091091001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11091091021) 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, 3060335 + ... + 3063956.

It is an arithmetic number, because the mean of its divisors is an integer number (2774304276).

Almost surely, 2^11091091001 is an apocalyptic number.

It is an amenable number.

11091091001 is a deficient number, since it is larger than the sum of its proper divisors (6126103).

11091091001 is an equidigital number, since it uses as much as digits as its factorization.

11091091001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6126102.

The product of its (nonzero) digits is 81, while the sum is 23.

The spelling of 11091091001 in words is "eleven billion, ninety-one million, ninety-one thousand, one".