10991208922 has 8 divisors (see below), whose sum is σ = 16513710516. Its totient is φ = 5486638752.

The previous prime is 10991208871. The next prime is 10991208931. The reversal of 10991208922 is 22980219901.

It can be written as a sum of positive squares in 2 ways, for example, as 10981153681 + 10055241 = 104791^2 + 3171^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4481323 + ... + 4483774.

Almost surely, 2^10991208922 is an apocalyptic number.

10991208922 is a deficient number, since it is larger than the sum of its proper divisors (5522501594).

10991208922 is an equidigital number, since it uses as much as digits as its factorization.

10991208922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8965712.

The product of its (nonzero) digits is 46656, while the sum is 43.

The spelling of 10991208922 in words is "ten billion, nine hundred ninety-one million, two hundred eight thousand, nine hundred twenty-two".