21000002312223 has 24 divisors (see below), whose sum is σ = 33544212920400. Its totient is φ = 12552927903360.

The previous prime is 21000002312209. The next prime is 21000002312321. The reversal of 21000002312223 is 32221320000012.

21000002312223 is a `hidden beast` number, since 210 + 0 + 0 + 0 + 0 + 231 + 2 + 223 = 666.

It is not a de Polignac number, because 21000002312223 - 2³³ = 20991412377631 is a prime.

It is a super-2 number, since 2×21000002312223² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21000002312196 and 21000002312205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000002312323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1452877948 + ... + 1452892401.

It is an arithmetic number, because the mean of its divisors is an integer number (1397675538350).

Almost surely, 2^{21000002312223} is an apocalyptic number.

21000002312223 is a deficient number, since it is larger than the sum of its proper divisors (12544210608177).

21000002312223 is a wasteful number, since it uses less digits than its factorization.

21000002312223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905770439 (or 2905770436 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21000002312223 its reverse (32221320000012), we get a palindrome (53221322312235).

The spelling of 21000002312223 in words is "twenty-one trillion, two million, three hundred twelve thousand, two hundred twenty-three".