1099110221 has 4 divisors (see below), whose sum is σ = 1199029344. Its totient is φ = 999191100.

The previous prime is 1099110211. The next prime is 1099110227. The reversal of 1099110221 is 1220119901.

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.

It is a cyclic number.

It is not a de Polignac number, because 1099110221 - 2²⁶ = 1032001357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099110227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49959545 + ... + 49959566.

It is an arithmetic number, because the mean of its divisors is an integer number (299757336).

Almost surely, 2^1099110221 is an apocalyptic number.

1099110221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1099110221 is a deficient number, since it is larger than the sum of its proper divisors (99919123).

1099110221 is an equidigital number, since it uses as much as digits as its factorization.

1099110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99919122.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 1099110221 is about 33152.8312667259. The cubic root of 1099110221 is about 1032.0017066880.

It can be divided in two parts, 10991 and 10221, that added together give a palindrome (21212).

The spelling of 1099110221 in words is "one billion, ninety-nine million, one hundred ten thousand, two hundred twenty-one".