21310020033223 has 4 divisors (see below), whose sum is σ = 21505524804280. Its totient is φ = 21114515262168.

The previous prime is 21310020033221. The next prime is 21310020033227. The reversal of 21310020033223 is 32233002001312.

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 21310020033223 - 2¹ = 21310020033221 is a prime.

It is a super-3 number, since 3×21310020033223³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21310020033194 and 21310020033203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310020033221) 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, 97752385365 + ... + 97752385582.

It is an arithmetic number, because the mean of its divisors is an integer number (5376381201070).

Almost surely, 2^{21310020033223} is an apocalyptic number.

21310020033223 is a deficient number, since it is larger than the sum of its proper divisors (195504771057).

21310020033223 is a wasteful number, since it uses less digits than its factorization.

21310020033223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195504771056.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21310020033223 its reverse (32233002001312), we get a palindrome (53543022034535).

The spelling of 21310020033223 in words is "twenty-one trillion, three hundred ten billion, twenty million, thirty-three thousand, two hundred twenty-three".