221231321323 has 8 divisors (see below), whose sum is σ = 230862981888. Its totient is φ = 211600736424.

The previous prime is 221231321321. The next prime is 221231321357. The reversal of 221231321323 is 323123132122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221231321323 - 2¹ = 221231321321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221231321321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166386 + ... + 685672.

It is an arithmetic number, because the mean of its divisors is an integer number (28857872736).

Almost surely, 2^221231321323 is an apocalyptic number.

221231321323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221231321323 is a deficient number, since it is larger than the sum of its proper divisors (9631660565).

221231321323 is a wasteful number, since it uses less digits than its factorization.

221231321323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537833.

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

Adding to 221231321323 its reverse (323123132122), we get a palindrome (544354453445).

The spelling of 221231321323 in words is "two hundred twenty-one billion, two hundred thirty-one million, three hundred twenty-one thousand, three hundred twenty-three".