21021332233 has 8 divisors (see below), whose sum is σ = 24139329120. Its totient is φ = 18104496480.

The previous prime is 21021332191. The next prime is 21021332251. The reversal of 21021332233 is 33223312012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21021332233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021332273) 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, 50290060 + ... + 50290477.

It is an arithmetic number, because the mean of its divisors is an integer number (3017416140).

Almost surely, 2^21021332233 is an apocalyptic number.

It is an amenable number.

21021332233 is a deficient number, since it is larger than the sum of its proper divisors (3117996887).

21021332233 is a wasteful number, since it uses less digits than its factorization.

21021332233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100580567.

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

Adding to 21021332233 its reverse (33223312012), we get a palindrome (54244644245).

The spelling of 21021332233 in words is "twenty-one billion, twenty-one million, three hundred thirty-two thousand, two hundred thirty-three".