21321230333 has 8 divisors (see below), whose sum is σ = 22962809688. Its totient is φ = 19679863104.

The previous prime is 21321230327. The next prime is 21321230341. The reversal of 21321230333 is 33303212312.

It can be written as a sum of positive squares in 4 ways, for example, as 753941764 + 20567288569 = 27458^2 + 143413^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21321230333 - 2¹² = 21321226237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21321230299 and 21321230308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321230383) 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, 200735 + ... + 287987.

It is an arithmetic number, because the mean of its divisors is an integer number (2870351211).

Almost surely, 2^21321230333 is an apocalyptic number.

It is an amenable number.

21321230333 is a deficient number, since it is larger than the sum of its proper divisors (1641579355).

21321230333 is a wasteful number, since it uses less digits than its factorization.

21321230333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106063.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21321230333 its reverse (33303212312), we get a palindrome (54624442645).

The spelling of 21321230333 in words is "twenty-one billion, three hundred twenty-one million, two hundred thirty thousand, three hundred thirty-three".