21300133302221 has 12 divisors (see below), whose sum is σ = 22062537474432. Its totient is φ = 20563231701264.

The previous prime is 21300133302199. The next prime is 21300133302247. The reversal of 21300133302221 is 12220333100312.

It is not a de Polignac number, because 21300133302221 - 2⁶ = 21300133302157 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 (21300133302421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5702330 + ... + 8666996.

It is an arithmetic number, because the mean of its divisors is an integer number (1838544789536).

Almost surely, 2^{21300133302221} is an apocalyptic number.

It is an amenable number.

21300133302221 is a deficient number, since it is larger than the sum of its proper divisors (762404172211).

21300133302221 is an equidigital number, since it uses as much as digits as its factorization.

21300133302221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2973268 (or 2973239 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21300133302221 its reverse (12220333100312), we get a palindrome (33520466402533).

The spelling of 21300133302221 in words is "twenty-one trillion, three hundred billion, one hundred thirty-three million, three hundred two thousand, two hundred twenty-one".