21200002221001 has 8 divisors (see below), whose sum is σ = 22316683838400. Its totient is φ = 20083409806320.

The previous prime is 21200002220987. The next prime is 21200002221007. The reversal of 21200002221001 is 10012220000212.

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 a de Polignac number, because none of the positive numbers 2^k-21200002221001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200002221007) 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, 21812566 + ... + 22763743.

It is an arithmetic number, because the mean of its divisors is an integer number (2789585479800).

Almost surely, 2^{21200002221001} is an apocalyptic number.

It is an amenable number.

21200002221001 is a deficient number, since it is larger than the sum of its proper divisors (1116681617399).

21200002221001 is a wasteful number, since it uses less digits than its factorization.

21200002221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44601359.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21200002221001 its reverse (10012220000212), we get a palindrome (31212222221213).

The spelling of 21200002221001 in words is "twenty-one trillion, two hundred billion, two million, two hundred twenty-one thousand, one".