1101100611665 has 8 divisors (see below), whose sum is σ = 1336167034920. Its totient is φ = 870982955392.

The previous prime is 1101100611647. The next prime is 1101100611671. The reversal of 1101100611665 is 5661160011011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8774630929 + 1092325980736 = 93673^2 + 1045144^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1101100611665 - 2⁶ = 1101100611601 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1237191254 + ... + 1237192143.

It is an arithmetic number, because the mean of its divisors is an integer number (167020879365).

Almost surely, 2^{1101100611665} is an apocalyptic number.

It is an amenable number.

1101100611665 is a deficient number, since it is larger than the sum of its proper divisors (235066423255).

1101100611665 is an equidigital number, since it uses as much as digits as its factorization.

1101100611665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474383491.

The product of its (nonzero) digits is 1080, while the sum is 29.

Adding to 1101100611665 its reverse (5661160011011), we get a palindrome (6762260622676).

The spelling of 1101100611665 in words is "one trillion, one hundred one billion, one hundred million, six hundred eleven thousand, six hundred sixty-five".