21313332221333 has 4 divisors (see below), whose sum is σ = 21313537630188. Its totient is φ = 21313126812480.

The previous prime is 21313332221329. The next prime is 21313332221369. The reversal of 21313332221333 is 33312223331312.

It is a happy number.

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 3750175552369 + 17563156668964 = 1936537^2 + 4190842^2 .

It is a cyclic number.

It is not a de Polignac number, because 21313332221333 - 2² = 21313332221329 is a prime.

It is a super-2 number, since 2×21313332221333² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21313332221333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313332221633) 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, 102548708 + ... + 102756333.

It is an arithmetic number, because the mean of its divisors is an integer number (5328384407547).

Almost surely, 2^{21313332221333} is an apocalyptic number.

It is an amenable number.

21313332221333 is a deficient number, since it is larger than the sum of its proper divisors (205408855).

21313332221333 is a wasteful number, since it uses less digits than its factorization.

21313332221333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205408854.

The product of its digits is 34992, while the sum is 32.

Adding to 21313332221333 its reverse (33312223331312), we get a palindrome (54625555552645).

The spelling of 21313332221333 in words is "twenty-one trillion, three hundred thirteen billion, three hundred thirty-two million, two hundred twenty-one thousand, three hundred thirty-three".