21211223333 has 16 divisors (see below), whose sum is σ = 21826221120. Its totient is φ = 20604589824.

The previous prime is 21211223317. The next prime is 21211223339. The reversal of 21211223333 is 33332211212.

It is a cyclic number.

It is not a de Polignac number, because 21211223333 - 2⁴ = 21211223317 is a prime.

It is a super-3 number, since 3×21211223333³ (a number of 32 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 = 21211223299 and 21211223308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211223339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9455510 + ... + 9457752.

It is an arithmetic number, because the mean of its divisors is an integer number (1364138820).

Almost surely, 2^21211223333 is an apocalyptic number.

It is an amenable number.

21211223333 is a deficient number, since it is larger than the sum of its proper divisors (614997787).

21211223333 is a wasteful number, since it uses less digits than its factorization.

21211223333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988.

The product of its digits is 1296, while the sum is 23.

Adding to 21211223333 its reverse (33332211212), we get a palindrome (54543434545).

The spelling of 21211223333 in words is "twenty-one billion, two hundred eleven million, two hundred twenty-three thousand, three hundred thirty-three".