21321123333 has 8 divisors (see below), whose sum is σ = 28430599200. Its totient is φ = 14212864848.

The previous prime is 21321123283. The next prime is 21321123361. The reversal of 21321123333 is 33332112312.

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

It is not a de Polignac number, because 21321123333 - 2¹⁴ = 21321106949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321123133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262663 + ... + 334116.

It is an arithmetic number, because the mean of its divisors is an integer number (3553824900).

Almost surely, 2^21321123333 is an apocalyptic number.

It is an amenable number.

21321123333 is a deficient number, since it is larger than the sum of its proper divisors (7109475867).

21321123333 is a wasteful number, since it uses less digits than its factorization.

21321123333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608691.

The product of its digits is 1944, while the sum is 24.

Adding to 21321123333 its reverse (33332112312), we get a palindrome (54653235645).

The spelling of 21321123333 in words is "twenty-one billion, three hundred twenty-one million, one hundred twenty-three thousand, three hundred thirty-three".