11091199021 has 8 divisors (see below), whose sum is σ = 12748927104. Its totient is φ = 9451788720.

The previous prime is 11091198967. The next prime is 11091199027. The reversal of 11091199021 is 12099119011.

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

It is a cyclic number.

It is not a de Polignac number, because 11091199021 - 2⁷ = 11091198893 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 (11091199027) 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, 4578145 + ... + 4580566.

It is an arithmetic number, because the mean of its divisors is an integer number (1593615888).

Almost surely, 2^11091199021 is an apocalyptic number.

It is an amenable number.

11091199021 is a deficient number, since it is larger than the sum of its proper divisors (1657728083).

11091199021 is an equidigital number, since it uses as much as digits as its factorization.

11091199021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9158891.

The product of its (nonzero) digits is 1458, while the sum is 34.

The spelling of 11091199021 in words is "eleven billion, ninety-one million, one hundred ninety-nine thousand, twenty-one".