1100011001 has 8 divisors (see below), whose sum is σ = 1107083208. Its totient is φ = 1092960000.

The previous prime is 1100010973. The next prime is 1100011013. The reversal of 1100011001 is 1001100011.

It can be written as a sum of positive squares in 4 ways, for example, as 483780025 + 616230976 = 21995^2 + 24824^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100011001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100011021) 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, 106151 + ... + 116051.

It is an arithmetic number, because the mean of its divisors is an integer number (138385401).

Almost surely, 2^1100011001 is an apocalyptic number.

It is an amenable number.

1100011001 is a deficient number, since it is larger than the sum of its proper divisors (7072207).

1100011001 is an equidigital number, since it uses as much as digits as its factorization.

1100011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10603.

The product of its (nonzero) digits is 1, while the sum is 5.

The square root of 1100011001 is about 33166.4137494544. The cubic root of 1100011001 is about 1032.2835566914.

Adding to 1100011001 its reverse (1001100011), we get a palindrome (2101111012).

The spelling of 1100011001 in words is "one billion, one hundred million, eleven thousand, one".