21233321313 has 16 divisors (see below), whose sum is σ = 30606592320. Its totient is φ = 13048070976.

The previous prime is 21233321251. The next prime is 21233321321. The reversal of 21233321313 is 31312333212.

It is not a de Polignac number, because 21233321313 - 2¹⁶ = 21233255777 is a prime.

It is a super-2 number, since 2×21233321313² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21233328313) 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 15 ways as a sum of consecutive naturals, for example, 5031870 + ... + 5036087.

It is an arithmetic number, because the mean of its divisors is an integer number (1912912020).

Almost surely, 2^21233321313 is an apocalyptic number.

It is an amenable number.

21233321313 is a deficient number, since it is larger than the sum of its proper divisors (9373271007).

21233321313 is a wasteful number, since it uses less digits than its factorization.

21233321313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10068016.

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

Adding to 21233321313 its reverse (31312333212), we get a palindrome (52545654525).

The spelling of 21233321313 in words is "twenty-one billion, two hundred thirty-three million, three hundred twenty-one thousand, three hundred thirteen".