21223210320223 has 4 divisors (see below), whose sum is σ = 21740849596368. Its totient is φ = 20705571044080.

The previous prime is 21223210320203. The next prime is 21223210320269. The reversal of 21223210320223 is 32202301232212.

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 21223210320223 - 2³³ = 21214620385631 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 (21223210320203) 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, 258819638011 + ... + 258819638092.

It is an arithmetic number, because the mean of its divisors is an integer number (5435212399092).

Almost surely, 2^{21223210320223} is an apocalyptic number.

21223210320223 is a deficient number, since it is larger than the sum of its proper divisors (517639276145).

21223210320223 is an equidigital number, since it uses as much as digits as its factorization.

21223210320223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517639276144.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21223210320223 its reverse (32202301232212), we get a palindrome (53425511552435).

The spelling of 21223210320223 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred ten million, three hundred twenty thousand, two hundred twenty-three".