320123122220 has 96 divisors (see below), whose sum is σ = 788396958720. Its totient is φ = 107935165440.

The previous prime is 320123122159. The next prime is 320123122223. The reversal of 320123122220 is 22221321023.

It is a happy number.

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 = 320123122192 and 320123122201.

It is not an unprimeable number, because it can be changed into a prime (320123122223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 618269 + ... + 1011188.

It is an arithmetic number, because the mean of its divisors is an integer number (8212468320).

Almost surely, 2^320123122220 is an apocalyptic number.

It is an amenable number.

320123122220 is an abundant number, since it is smaller than the sum of its proper divisors (468273836500).

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

320123122220 is a wasteful number, since it uses less digits than its factorization.

320123122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629543 (or 1629541 counting only the distinct ones).

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

Adding to 320123122220 its reverse (22221321023), we get a palindrome (342344443243).

The spelling of 320123122220 in words is "three hundred twenty billion, one hundred twenty-three million, one hundred twenty-two thousand, two hundred twenty".