320123031220 has 24 divisors (see below), whose sum is σ = 672350674464. Its totient is φ = 128031629856.

The previous prime is 320123031149. The next prime is 320123031223. The reversal of 320123031220 is 22130321023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320123031223) 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, 949122 + ... + 1241401.

It is an arithmetic number, because the mean of its divisors is an integer number (28014611436).

Almost surely, 2^320123031220 is an apocalyptic number.

It is an amenable number.

320123031220 is an abundant number, since it is smaller than the sum of its proper divisors (352227643244).

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

320123031220 is a wasteful number, since it uses less digits than its factorization.

320123031220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197839 (or 2197837 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 320123031220 its reverse (22130321023), we get a palindrome (342253352243).

The spelling of 320123031220 in words is "three hundred twenty billion, one hundred twenty-three million, thirty-one thousand, two hundred twenty".