320105215012 has 72 divisors (see below), whose sum is σ = 639180263232. Its totient is φ = 139101019200.

The previous prime is 320105215009. The next prime is 320105215019. The reversal of 320105215012 is 210512501023.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (320105215019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81720078 + ... + 81723994.

It is an arithmetic number, because the mean of its divisors is an integer number (8877503656).

Almost surely, 2^320105215012 is an apocalyptic number.

It is an amenable number.

320105215012 is a deficient number, since it is larger than the sum of its proper divisors (319075048220).

320105215012 is a wasteful number, since it uses less digits than its factorization.

320105215012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7489 (or 7464 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 320105215012 its reverse (210512501023), we get a palindrome (530617716035).

The spelling of 320105215012 in words is "three hundred twenty billion, one hundred five million, two hundred fifteen thousand, twelve".