21002110012001 has 8 divisors (see below), whose sum is σ = 21753927232320. Its totient is φ = 20252133227088.

The previous prime is 21002110011991. The next prime is 21002110012031. The reversal of 21002110012001 is 10021001120012.

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 21002110012001 - 2¹⁴ = 21002109995617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21002110012031) 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 7 ways as a sum of consecutive naturals, for example, 460085621 + ... + 460131266.

It is an arithmetic number, because the mean of its divisors is an integer number (2719240904040).

Almost surely, 2^{21002110012001} is an apocalyptic number.

It is an amenable number.

21002110012001 is a deficient number, since it is larger than the sum of its proper divisors (751817220319).

21002110012001 is an equidigital number, since it uses as much as digits as its factorization.

21002110012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920217703.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21002110012001 its reverse (10021001120012), we get a palindrome (31023111132013).

The spelling of 21002110012001 in words is "twenty-one trillion, two billion, one hundred ten million, twelve thousand, one".