11001001010001 has 4 divisors (see below), whose sum is σ = 14668001346672. Its totient is φ = 7334000673332.

The previous prime is 11001001009961. The next prime is 11001001010003. The reversal of 11001001010001 is 10001010010011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11001001010001 - 2²³ = 11000992621393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11001001010003) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1833500168331 + ... + 1833500168336.

It is an arithmetic number, because the mean of its divisors is an integer number (3667000336668).

Almost surely, 2^{11001001010001} is an apocalyptic number.

It is an amenable number.

11001001010001 is a deficient number, since it is larger than the sum of its proper divisors (3667000336671).

11001001010001 is an equidigital number, since it uses as much as digits as its factorization.

11001001010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3667000336670.

The product of its (nonzero) digits is 1, while the sum is 6.

Adding to 11001001010001 its reverse (10001010010011), we get a palindrome (21002011020012).

It can be divided in two parts, 110010010 and 10001, that added together give a palindrome (110020011).

The spelling of 11001001010001 in words is "eleven trillion, one billion, one million, ten thousand, one".