1099109121 has 8 divisors (see below), whose sum is σ = 1598704224. Its totient is φ = 666126720.

The previous prime is 1099109117. The next prime is 1099109129. The reversal of 1099109121 is 1219019901.

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

It is not a de Polignac number, because 1099109121 - 2² = 1099109117 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 33306337 = 1099109121 / (1 + 0 + 9 + 9 + 1 + 0 + 9 + 1 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (1099109129) 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, 16653136 + ... + 16653201.

It is an arithmetic number, because the mean of its divisors is an integer number (199838028).

Almost surely, 2^1099109121 is an apocalyptic number.

1099109121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1099109121 is a deficient number, since it is larger than the sum of its proper divisors (499595103).

1099109121 is a wasteful number, since it uses less digits than its factorization.

1099109121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33306351.

The product of its (nonzero) digits is 1458, while the sum is 33.

The square root of 1099109121 is about 33152.8146768868. The cubic root of 1099109121 is about 1032.0013624088.

The spelling of 1099109121 in words is "one billion, ninety-nine million, one hundred nine thousand, one hundred twenty-one".