221323204013 has 16 divisors (see below), whose sum is σ = 225667278720. Its totient is φ = 217023307776.

The previous prime is 221323203989. The next prime is 221323204061. The reversal of 221323204013 is 310402323122.

It is a cyclic number.

It is not a de Polignac number, because 221323204013 - 2²⁴ = 221306426797 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221323204013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221323204093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34922381 + ... + 34928717.

It is an arithmetic number, because the mean of its divisors is an integer number (14104204920).

Almost surely, 2^221323204013 is an apocalyptic number.

It is an amenable number.

221323204013 is a deficient number, since it is larger than the sum of its proper divisors (4344074707).

221323204013 is a wasteful number, since it uses less digits than its factorization.

221323204013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9716.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 221323204013 its reverse (310402323122), we get a palindrome (531725527135).

The spelling of 221323204013 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred four thousand, thirteen".