21302311332221 has 32 divisors (see below), whose sum is σ = 23076371017728. Its totient is φ = 19613306370240.

The previous prime is 21302311332167. The next prime is 21302311332229. The reversal of 21302311332221 is 12223311320312.

It is not a de Polignac number, because 21302311332221 - 2¹⁴ = 21302311315837 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 (21302311332229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 798334346 + ... + 798361028.

It is an arithmetic number, because the mean of its divisors is an integer number (721136594304).

Almost surely, 2^{21302311332221} is an apocalyptic number.

It is an amenable number.

21302311332221 is a deficient number, since it is larger than the sum of its proper divisors (1774059685507).

21302311332221 is a wasteful number, since it uses less digits than its factorization.

21302311332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38921.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21302311332221 its reverse (12223311320312), we get a palindrome (33525622652533).

The spelling of 21302311332221 in words is "twenty-one trillion, three hundred two billion, three hundred eleven million, three hundred thirty-two thousand, two hundred twenty-one".