11001011101001 has 4 divisors (see below), whose sum is σ = 11001504951492. Its totient is φ = 11000517250512.

The previous prime is 11001011100949. The next prime is 11001011101021. The reversal of 11001011101001 is 10010111010011.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9406801836601 + 1594209264400 = 3067051^2 + 1262620^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001011101001 - 2²² = 11001006906697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11001011101001.

It is not an unprimeable number, because it can be changed into a prime (11001011101021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246891830 + ... + 246936383.

It is an arithmetic number, because the mean of its divisors is an integer number (2750376237873).

Almost surely, 2^{11001011101001} is an apocalyptic number.

It is an amenable number.

11001011101001 is a deficient number, since it is larger than the sum of its proper divisors (493850491).

11001011101001 is an equidigital number, since it uses as much as digits as its factorization.

11001011101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493850490.

The product of its (nonzero) digits is 1, while the sum is 8.

Adding to 11001011101001 its reverse (10010111010011), we get a palindrome (21011122111012).

The spelling of 11001011101001 in words is "eleven trillion, one billion, eleven million, one hundred one thousand, one".