21223033321 has 12 divisors (see below), whose sum is σ = 24703822800. Its totient is φ = 18179526120.

The previous prime is 21223033303. The next prime is 21223033333. The reversal of 21223033321 is 12333032212.

It is not a de Polignac number, because 21223033321 - 2¹¹ = 21223031273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21223033292 and 21223033301.

It is not an unprimeable number, because it can be changed into a prime (21223030321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60871 + ... + 214828.

It is an arithmetic number, because the mean of its divisors is an integer number (2058651900).

Almost surely, 2^21223033321 is an apocalyptic number.

It is an amenable number.

21223033321 is a deficient number, since it is larger than the sum of its proper divisors (3480789479).

21223033321 is a wasteful number, since it uses less digits than its factorization.

21223033321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277284 (or 277277 counting only the distinct ones).

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

Adding to 21223033321 its reverse (12333032212), we get a palindrome (33556065533).

The spelling of 21223033321 in words is "twenty-one billion, two hundred twenty-three million, thirty-three thousand, three hundred twenty-one".