21343211323 has 8 divisors (see below), whose sum is σ = 25827079392. Its totient is φ = 17218052736.

The previous prime is 21343211311. The next prime is 21343211333. The reversal of 21343211323 is 32311234312.

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-21343211323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21343211333) 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, 89677240 + ... + 89677477.

It is an arithmetic number, because the mean of its divisors is an integer number (3228384924).

Almost surely, 2^21343211323 is an apocalyptic number.

21343211323 is a deficient number, since it is larger than the sum of its proper divisors (4483868069).

21343211323 is a wasteful number, since it uses less digits than its factorization.

21343211323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179354741.

The product of its digits is 2592, while the sum is 25.

Adding to 21343211323 its reverse (32311234312), we get a palindrome (53654445635).

The spelling of 21343211323 in words is "twenty-one billion, three hundred forty-three million, two hundred eleven thousand, three hundred twenty-three".