320404021123 has 4 divisors (see below), whose sum is σ = 325186170760. Its totient is φ = 315621871488.

The previous prime is 320404021081. The next prime is 320404021153. The reversal of 320404021123 is 321120404023.

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

It is a cyclic number.

It is not a de Polignac number, because 320404021123 - 2³⁷ = 182965067651 is a prime.

It is a super-2 number, since 2×320404021123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320404021094 and 320404021103.

It is not an unprimeable number, because it can be changed into a prime (320404021153) 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, 2391074718 + ... + 2391074851.

It is an arithmetic number, because the mean of its divisors is an integer number (81296542690).

Almost surely, 2^320404021123 is an apocalyptic number.

320404021123 is a deficient number, since it is larger than the sum of its proper divisors (4782149637).

320404021123 is an equidigital number, since it uses as much as digits as its factorization.

320404021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4782149636.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 320404021123 its reverse (321120404023), we get a palindrome (641524425146).

The spelling of 320404021123 in words is "three hundred twenty billion, four hundred four million, twenty-one thousand, one hundred twenty-three".