21213312330233 has 8 divisors (see below), whose sum is σ = 21732182384640. Its totient is φ = 20694512380320.

The previous prime is 21213312330187. The next prime is 21213312330247. The reversal of 21213312330233 is 33203321331212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21213312330233 - 2²⁶ = 21213245221369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21213312330196 and 21213312330205.

It is not an unprimeable number, because it can be changed into a prime (21213312330533) 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, 16913273 + ... + 18124166.

It is an arithmetic number, because the mean of its divisors is an integer number (2716522798080).

Almost surely, 2^{21213312330233} is an apocalyptic number.

It is an amenable number.

21213312330233 is a deficient number, since it is larger than the sum of its proper divisors (518870054407).

21213312330233 is a wasteful number, since it uses less digits than its factorization.

21213312330233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35052247.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 21213312330233 its reverse (33203321331212), we get a palindrome (54416633661445).

The spelling of 21213312330233 in words is "twenty-one trillion, two hundred thirteen billion, three hundred twelve million, three hundred thirty thousand, two hundred thirty-three".