320440011220123 has 4 divisors (see below), whose sum is σ = 321596834365600. Its totient is φ = 319283188074648.

The previous prime is 320440011220099. The next prime is 320440011220177. The reversal of 320440011220123 is 321022110044023.

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-320440011220123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320440011220183) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 578411572323 + ... + 578411572876.

It is an arithmetic number, because the mean of its divisors is an integer number (80399208591400).

Almost surely, 2^{320440011220123} is an apocalyptic number.

320440011220123 is a deficient number, since it is larger than the sum of its proper divisors (1156823145477).

320440011220123 is a wasteful number, since it uses less digits than its factorization.

320440011220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156823145476.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 320440011220123 its reverse (321022110044023), we get a palindrome (641462121264146).

The spelling of 320440011220123 in words is "three hundred twenty trillion, four hundred forty billion, eleven million, two hundred twenty thousand, one hundred twenty-three".