1099019911 has 4 divisors (see below), whose sum is σ = 1198930824. Its totient is φ = 999109000.

The previous prime is 1099019897. The next prime is 1099019947. The reversal of 1099019911 is 1199109901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1099019911 - 2¹⁵ = 1098987143 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099019711) 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, 49955440 + ... + 49955461.

It is an arithmetic number, because the mean of its divisors is an integer number (299732706).

Almost surely, 2^1099019911 is an apocalyptic number.

1099019911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1099019911 is a deficient number, since it is larger than the sum of its proper divisors (99910913).

1099019911 is an equidigital number, since it uses as much as digits as its factorization.

1099019911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99910912.

The product of its (nonzero) digits is 6561, while the sum is 40.

The square root of 1099019911 is about 33151.4692132943. The cubic root of 1099019911 is about 1031.9734406036.

The spelling of 1099019911 in words is "one billion, ninety-nine million, nineteen thousand, nine hundred eleven".