21002110210001 has 8 divisors (see below), whose sum is σ = 22179495787680. Its totient is φ = 19831925767968.

The previous prime is 21002110209989. The next prime is 21002110210063. The reversal of 21002110210001 is 10001201120012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002110210001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002110210091) 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, 1800277916 + ... + 1800289581.

It is an arithmetic number, because the mean of its divisors is an integer number (2772436973460).

Almost surely, 2^{21002110210001} is an apocalyptic number.

It is an amenable number.

21002110210001 is a deficient number, since it is larger than the sum of its proper divisors (1177385577679).

21002110210001 is a wasteful number, since it uses less digits than its factorization.

21002110210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600567823.

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

Adding to 21002110210001 its reverse (10001201120012), we get a palindrome (31003311330013).

The spelling of 21002110210001 in words is "twenty-one trillion, two billion, one hundred ten million, two hundred ten thousand, one".