21002200002001 has 8 divisors (see below), whose sum is σ = 21298125334464. Its totient is φ = 20706277994640.

The previous prime is 21002200001953. The next prime is 21002200002031. The reversal of 21002200002001 is 10020000220012.

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 21002200002001 - 2¹³ = 21002199993809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002200002031) 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, 13656591 + ... + 15116443.

It is an arithmetic number, because the mean of its divisors is an integer number (2662265666808).

Almost surely, 2^{21002200002001} is an apocalyptic number.

It is an amenable number.

21002200002001 is a deficient number, since it is larger than the sum of its proper divisors (295925332463).

21002200002001 is a wasteful number, since it uses less digits than its factorization.

21002200002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662551.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21002200002001 its reverse (10020000220012), we get a palindrome (31022200222013).

The spelling of 21002200002001 in words is "twenty-one trillion, two billion, two hundred million, two thousand, one".