221300323311 has 4 divisors (see below), whose sum is σ = 295067097752. Its totient is φ = 147533548872.

The previous prime is 221300323273. The next prime is 221300323313. The reversal of 221300323311 is 113323003122.

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

It is not a de Polignac number, because 221300323311 - 2¹⁸ = 221300061167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221300323313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36883387216 + ... + 36883387221.

It is an arithmetic number, because the mean of its divisors is an integer number (73766774438).

Almost surely, 2^221300323311 is an apocalyptic number.

221300323311 is a deficient number, since it is larger than the sum of its proper divisors (73766774441).

221300323311 is an equidigital number, since it uses as much as digits as its factorization.

221300323311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73766774440.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 221300323311 its reverse (113323003122), we get a palindrome (334623326433).

The spelling of 221300323311 in words is "two hundred twenty-one billion, three hundred million, three hundred twenty-three thousand, three hundred eleven".