320321204120 has 32 divisors (see below), whose sum is σ = 724381218000. Its totient is φ = 127478080128.

The previous prime is 320321204101. The next prime is 320321204129. The reversal of 320321204120 is 21402123023.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 320321204092 and 320321204101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320321204129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20317070 + ... + 20332829.

Almost surely, 2^320321204120 is an apocalyptic number.

It is an amenable number.

320321204120 is an abundant number, since it is smaller than the sum of its proper divisors (404060013880).

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

320321204120 is a wasteful number, since it uses less digits than its factorization.

320321204120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40650107 (or 40650103 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 320321204120 its reverse (21402123023), we get a palindrome (341723327143).

The spelling of 320321204120 in words is "three hundred twenty billion, three hundred twenty-one million, two hundred four thousand, one hundred twenty".