21010130003221 has 8 divisors (see below), whose sum is σ = 22395874755200. Its totient is φ = 19652380094880.

The previous prime is 21010130003207. The next prime is 21010130003227. The reversal of 21010130003221 is 12230003101012.

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-21010130003221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010130003195 and 21010130003204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010130003227) 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, 6998709360 + ... + 6998712361.

It is an arithmetic number, because the mean of its divisors is an integer number (2799484344400).

Almost surely, 2^{21010130003221} is an apocalyptic number.

It is an amenable number.

21010130003221 is a deficient number, since it is larger than the sum of its proper divisors (1385744751979).

21010130003221 is a wasteful number, since it uses less digits than its factorization.

21010130003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13997421819.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21010130003221 its reverse (12230003101012), we get a palindrome (33240133104233).

The spelling of 21010130003221 in words is "twenty-one trillion, ten billion, one hundred thirty million, three thousand, two hundred twenty-one".