11001001002001 has 8 divisors (see below), whose sum is σ = 11177899949664. Its totient is φ = 10825158168000.

The previous prime is 11001001001971. The next prime is 11001001002011. The reversal of 11001001002001 is 10020010010011.

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 11001001002001 - 2²¹ = 11000998904849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11001001002011) 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, 264007416 + ... + 264049081.

It is an arithmetic number, because the mean of its divisors is an integer number (1397237493708).

Almost surely, 2^{11001001002001} is an apocalyptic number.

It is an amenable number.

11001001002001 is a deficient number, since it is larger than the sum of its proper divisors (176898947663).

11001001002001 is an equidigital number, since it uses as much as digits as its factorization.

11001001002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528056831.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 11001001002001 its reverse (10020010010011), we get a palindrome (21021011012012).

The spelling of 11001001002001 in words is "eleven trillion, one billion, one million, two thousand, one".