221311123223 has 4 divisors (see below), whose sum is σ = 221418924168. Its totient is φ = 221203322280.

The previous prime is 221311123219. The next prime is 221311123277. The reversal of 221311123223 is 322321113122.

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 221311123223 - 2² = 221311123219 is a prime.

It is a super-2 number, since 2×221311123223² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221311123213) 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, 53897393 + ... + 53901498.

It is an arithmetic number, because the mean of its divisors is an integer number (55354731042).

Almost surely, 2^221311123223 is an apocalyptic number.

221311123223 is a deficient number, since it is larger than the sum of its proper divisors (107800945).

221311123223 is a wasteful number, since it uses less digits than its factorization.

221311123223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107800944.

The product of its digits is 864, while the sum is 23.

Adding to 221311123223 its reverse (322321113122), we get a palindrome (543632236345).

The spelling of 221311123223 in words is "two hundred twenty-one billion, three hundred eleven million, one hundred twenty-three thousand, two hundred twenty-three".