21302210330321 has 8 divisors (see below), whose sum is σ = 21880027181544. Its totient is φ = 20724503028480.

The previous prime is 21302210330309. The next prime is 21302210330353. The reversal of 21302210330321 is 12303301220312.

It can be written as a sum of positive squares in 4 ways, for example, as 274116120721 + 21028094209600 = 523561^2 + 4585640^2 .

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-21302210330321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21302210330381) 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, 26993090 + ... + 27771051.

It is an arithmetic number, because the mean of its divisors is an integer number (2735003397693).

Almost surely, 2^{21302210330321} is an apocalyptic number.

It is an amenable number.

21302210330321 is a deficient number, since it is larger than the sum of its proper divisors (577816851223).

21302210330321 is a wasteful number, since it uses less digits than its factorization.

21302210330321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54774691.

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

Adding to 21302210330321 its reverse (12303301220312), we get a palindrome (33605511550633).

The spelling of 21302210330321 in words is "twenty-one trillion, three hundred two billion, two hundred ten million, three hundred thirty thousand, three hundred twenty-one".