21000322233 has 24 divisors (see below), whose sum is σ = 33095986560. Its totient is φ = 12725710560.

The previous prime is 21000322229. The next prime is 21000322243. The reversal of 21000322233 is 33222300012.

It is a happy number.

It is not a de Polignac number, because 21000322233 - 2² = 21000322229 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21000322243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1289103 + ... + 1305291.

It is an arithmetic number, because the mean of its divisors is an integer number (1378999440).

Almost surely, 2^21000322233 is an apocalyptic number.

It is an amenable number.

21000322233 is a deficient number, since it is larger than the sum of its proper divisors (12095664327).

21000322233 is a wasteful number, since it uses less digits than its factorization.

21000322233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29309 (or 29306 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21000322233 its reverse (33222300012), we get a palindrome (54222622245).

The spelling of 21000322233 in words is "twenty-one billion, three hundred twenty-two thousand, two hundred thirty-three".