21233220333 has 24 divisors (see below), whose sum is σ = 30787990272. Its totient is φ = 13010444928.

The previous prime is 21233220329. The next prime is 21233220361. The reversal of 21233220333 is 33302233212.

It is not a de Polignac number, because 21233220333 - 2² = 21233220329 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233220313) 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, 28260 + ... + 208002.

It is an arithmetic number, because the mean of its divisors is an integer number (1282832928).

Almost surely, 2^21233220333 is an apocalyptic number.

It is an amenable number.

21233220333 is a deficient number, since it is larger than the sum of its proper divisors (9554769939).

21233220333 is a wasteful number, since it uses less digits than its factorization.

21233220333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180005 (or 179992 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 21233220333 its reverse (33302233212), we get a palindrome (54535453545).

The spelling of 21233220333 in words is "twenty-one billion, two hundred thirty-three million, two hundred twenty thousand, three hundred thirty-three".