21302311332223 has 4 divisors (see below), whose sum is σ = 21302662875520. Its totient is φ = 21301959788928.

The previous prime is 21302311332167. The next prime is 21302311332229. The reversal of 21302311332223 is 32223311320312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21302311332223 - 2¹⁷ = 21302311201151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21302311332191 and 21302311332200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302311332229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175680738 + ... + 175801951.

It is an arithmetic number, because the mean of its divisors is an integer number (5325665718880).

Almost surely, 2^{21302311332223} is an apocalyptic number.

21302311332223 is a deficient number, since it is larger than the sum of its proper divisors (351543297).

21302311332223 is an equidigital number, since it uses as much as digits as its factorization.

21302311332223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351543296.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21302311332223 its reverse (32223311320312), we get a palindrome (53525622652535).

The spelling of 21302311332223 in words is "twenty-one trillion, three hundred two billion, three hundred eleven million, three hundred thirty-two thousand, two hundred twenty-three".