320120420505 has 8 divisors (see below), whose sum is σ = 512192672832. Its totient is φ = 170730890928.

The previous prime is 320120420497. The next prime is 320120420513. The reversal of 320120420505 is 505024021023.

It is an interprime number because it is at equal distance from previous prime (320120420497) and next prime (320120420513).

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

It is not a de Polignac number, because 320120420505 - 2³ = 320120420497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10670680669 + ... + 10670680698.

It is an arithmetic number, because the mean of its divisors is an integer number (64024084104).

Almost surely, 2^320120420505 is an apocalyptic number.

It is an amenable number.

320120420505 is a deficient number, since it is larger than the sum of its proper divisors (192072252327).

320120420505 is a wasteful number, since it uses less digits than its factorization.

320120420505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21341361375.

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 320120420505 its reverse (505024021023), we get a palindrome (825144441528).

The spelling of 320120420505 in words is "three hundred twenty billion, one hundred twenty million, four hundred twenty thousand, five hundred five".