11001211221001 has 8 divisors (see below), whose sum is σ = 11550422488320. Its totient is φ = 10463323897488.

The previous prime is 11001211220999. The next prime is 11001211221019. The reversal of 11001211221001 is 10012211210011.

It is a happy number.

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 11001211221001 - 2¹ = 11001211220999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11001211221061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2830983961 + ... + 2830987846.

It is an arithmetic number, because the mean of its divisors is an integer number (1443802811040).

Almost surely, 2^{11001211221001} is an apocalyptic number.

It is an amenable number.

11001211221001 is a deficient number, since it is larger than the sum of its proper divisors (549211267319).

11001211221001 is an equidigital number, since it uses as much as digits as its factorization.

11001211221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5661971903.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11001211221001 its reverse (10012211210011), we get a palindrome (21013422431012).

The spelling of 11001211221001 in words is "eleven trillion, one billion, two hundred eleven million, two hundred twenty-one thousand, one".