21022233233 has 4 divisors (see below), whose sum is σ = 21023254500. Its totient is φ = 21021211968.

The previous prime is 21022233229. The next prime is 21022233259. The reversal of 21022233233 is 33233222012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 928603729 + 20093629504 = 30473^2 + 141752^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022233233 - 2² = 21022233229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022233199 and 21022233208.

It is not an unprimeable number, because it can be changed into a prime (21022233203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479108 + ... + 521141.

It is an arithmetic number, because the mean of its divisors is an integer number (5255813625).

Almost surely, 2^21022233233 is an apocalyptic number.

It is an amenable number.

21022233233 is a deficient number, since it is larger than the sum of its proper divisors (1021267).

21022233233 is a wasteful number, since it uses less digits than its factorization.

21022233233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021266.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21022233233 its reverse (33233222012), we get a palindrome (54255455245).

The spelling of 21022233233 in words is "twenty-one billion, twenty-two million, two hundred thirty-three thousand, two hundred thirty-three".