21333313211323 has 4 divisors (see below), whose sum is σ = 21540432757168. Its totient is φ = 21126193665480.

The previous prime is 21333313211317. The next prime is 21333313211339. The reversal of 21333313211323 is 32311231333312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21333313211323 - 2²⁹ = 21332776340411 is a prime.

It is a super-2 number, since 2×21333313211323² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21333313211123) 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, 103559772768 + ... + 103559772973.

It is an arithmetic number, because the mean of its divisors is an integer number (5385108189292).

Almost surely, 2^{21333313211323} is an apocalyptic number.

21333313211323 is a deficient number, since it is larger than the sum of its proper divisors (207119545845).

21333313211323 is a wasteful number, since it uses less digits than its factorization.

21333313211323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207119545844.

The product of its digits is 17496, while the sum is 31.

Adding to 21333313211323 its reverse (32311231333312), we get a palindrome (53644544544635).

The spelling of 21333313211323 in words is "twenty-one trillion, three hundred thirty-three billion, three hundred thirteen million, two hundred eleven thousand, three hundred twenty-three".