21113213313323 has 4 divisors (see below), whose sum is σ = 21125054713488. Its totient is φ = 21101371913160.

The previous prime is 21113213313317. The next prime is 21113213313343. The reversal of 21113213313323 is 32331331231112.

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 21113213313323 - 2²⁸ = 21112944877867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113213313343) 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, 5920697408 + ... + 5920700973.

It is an arithmetic number, because the mean of its divisors is an integer number (5281263678372).

Almost surely, 2^{21113213313323} is an apocalyptic number.

21113213313323 is a deficient number, since it is larger than the sum of its proper divisors (11841400165).

21113213313323 is a wasteful number, since it uses less digits than its factorization.

21113213313323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11841400164.

The product of its digits is 5832, while the sum is 29.

Adding to 21113213313323 its reverse (32331331231112), we get a palindrome (53444544544435).

The spelling of 21113213313323 in words is "twenty-one trillion, one hundred thirteen billion, two hundred thirteen million, three hundred thirteen thousand, three hundred twenty-three".