21302003030221 has 4 divisors (see below), whose sum is σ = 21302031866944. Its totient is φ = 21301974193500.

The previous prime is 21302003030173. The next prime is 21302003030227. The reversal of 21302003030221 is 12203030020312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21302003030221 - 2¹⁹ = 21302002505933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302003030227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13280355 + ... + 14797696.

It is an arithmetic number, because the mean of its divisors is an integer number (5325507966736).

Almost surely, 2^{21302003030221} is an apocalyptic number.

It is an amenable number.

21302003030221 is a deficient number, since it is larger than the sum of its proper divisors (28836723).

21302003030221 is an equidigital number, since it uses as much as digits as its factorization.

21302003030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28836722.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21302003030221 its reverse (12203030020312), we get a palindrome (33505033050533).

The spelling of 21302003030221 in words is "twenty-one trillion, three hundred two billion, three million, thirty thousand, two hundred twenty-one".