221331320123 has 8 divisors (see below), whose sum is σ = 242431872480. Its totient is φ = 201128663680.

The previous prime is 221331320047. The next prime is 221331320141. The reversal of 221331320123 is 321023133122.

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 221331320123 - 2³⁶ = 152611843387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221331320143) 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 7 ways as a sum of consecutive naturals, for example, 224473463 + ... + 224474448.

It is an arithmetic number, because the mean of its divisors is an integer number (30303984060).

Almost surely, 2^221331320123 is an apocalyptic number.

221331320123 is a deficient number, since it is larger than the sum of its proper divisors (21100552357).

221331320123 is a wasteful number, since it uses less digits than its factorization.

221331320123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448947957.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 221331320123 its reverse (321023133122), we get a palindrome (542354453245).

The spelling of 221331320123 in words is "two hundred twenty-one billion, three hundred thirty-one million, three hundred twenty thousand, one hundred twenty-three".