221231323122 has 16 divisors (see below), whose sum is σ = 449716132992. Its totient is φ = 72534859920.

The previous prime is 221231323109. The next prime is 221231323211. The reversal of 221231323122 is 221323132122.

221231323122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 221231323092 and 221231323101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302228218 + ... + 302228949.

It is an arithmetic number, because the mean of its divisors is an integer number (28107258312).

Almost surely, 2^221231323122 is an apocalyptic number.

221231323122 is an abundant number, since it is smaller than the sum of its proper divisors (228484809870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221231323122 is a wasteful number, since it uses less digits than its factorization.

221231323122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604457233.

The product of its digits is 1728, while the sum is 24.

Adding to 221231323122 its reverse (221323132122), we get a palindrome (442554455244).

The spelling of 221231323122 in words is "two hundred twenty-one billion, two hundred thirty-one million, three hundred twenty-three thousand, one hundred twenty-two".