21323113023221 has 8 divisors (see below), whose sum is σ = 21334430491200. Its totient is φ = 21311798108832.

The previous prime is 21323113023217. The next prime is 21323113023239. The reversal of 21323113023221 is 12232031132312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21323113023221 - 2² = 21323113023217 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 (21323113023281) 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, 16183946 + ... + 17451828.

It is an arithmetic number, because the mean of its divisors is an integer number (2666803811400).

Almost surely, 2^{21323113023221} is an apocalyptic number.

It is an amenable number.

21323113023221 is a deficient number, since it is larger than the sum of its proper divisors (11317467979).

21323113023221 is a wasteful number, since it uses less digits than its factorization.

21323113023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276795.

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

Adding to 21323113023221 its reverse (12232031132312), we get a palindrome (33555144155533).

The spelling of 21323113023221 in words is "twenty-one trillion, three hundred twenty-three billion, one hundred thirteen million, twenty-three thousand, two hundred twenty-one".