221322331123 has 4 divisors (see below), whose sum is σ = 221362424008. Its totient is φ = 221282238240.

The previous prime is 221322331073. The next prime is 221322331133. The reversal of 221322331123 is 321133223122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221322331123 is a prime.

It is a super-2 number, since 2×221322331123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221322331133) 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, 20038161 + ... + 20049202.

It is an arithmetic number, because the mean of its divisors is an integer number (55340606002).

Almost surely, 2^221322331123 is an apocalyptic number.

221322331123 is a deficient number, since it is larger than the sum of its proper divisors (40092885).

221322331123 is an equidigital number, since it uses as much as digits as its factorization.

221322331123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40092884.

The product of its digits is 2592, while the sum is 25.

Adding to 221322331123 its reverse (321133223122), we get a palindrome (542455554245).

The spelling of 221322331123 in words is "two hundred twenty-one billion, three hundred twenty-two million, three hundred thirty-one thousand, one hundred twenty-three".