21300040221 has 8 divisors (see below), whose sum is σ = 28675782720. Its totient is φ = 14062162272.

The previous prime is 21300040213. The next prime is 21300040247. The reversal of 21300040221 is 12204000312.

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

It is not a de Polignac number, because 21300040221 - 2³ = 21300040213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21300040221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300040211) 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, 34465776 + ... + 34466393.

It is an arithmetic number, because the mean of its divisors is an integer number (3584472840).

Almost surely, 2^21300040221 is an apocalyptic number.

It is an amenable number.

21300040221 is a deficient number, since it is larger than the sum of its proper divisors (7375742499).

21300040221 is a wasteful number, since it uses less digits than its factorization.

21300040221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68932275.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21300040221 its reverse (12204000312), we get a palindrome (33504040533).

The spelling of 21300040221 in words is "twenty-one billion, three hundred million, forty thousand, two hundred twenty-one".