21313332221321 has 8 divisors (see below), whose sum is σ = 24374518857024. Its totient is φ = 18256251808080.

The previous prime is 21313332221273. The next prime is 21313332221327. The reversal of 21313332221321 is 12312223331312.

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-21313332221321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21313332221327) 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, 1026544490 + ... + 1026565251.

It is an arithmetic number, because the mean of its divisors is an integer number (3046814857128).

Almost surely, 2^{21313332221321} is an apocalyptic number.

It is an amenable number.

21313332221321 is a deficient number, since it is larger than the sum of its proper divisors (3061186635703).

21313332221321 is a wasteful number, since it uses less digits than its factorization.

21313332221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053111231.

The product of its digits is 7776, while the sum is 29.

Adding to 21313332221321 its reverse (12312223331312), we get a palindrome (33625555552633).

The spelling of 21313332221321 in words is "twenty-one trillion, three hundred thirteen billion, three hundred thirty-two million, two hundred twenty-one thousand, three hundred twenty-one".