320120203231 has 4 divisors (see below), whose sum is σ = 336968635000. Its totient is φ = 303271771464.

The previous prime is 320120203229. The next prime is 320120203253. The reversal of 320120203231 is 132302021023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320120203231 - 2¹ = 320120203229 is a prime.

It is a super-2 number, since 2×320120203231² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 16848431749 = 320120203231 / (3 + 2 + 0 + 1 + 2 + 0 + 2 + 0 + 3 + 2 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320120203199 and 320120203208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320120203831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8424215856 + ... + 8424215893.

It is an arithmetic number, because the mean of its divisors is an integer number (84242158750).

Almost surely, 2^320120203231 is an apocalyptic number.

320120203231 is a deficient number, since it is larger than the sum of its proper divisors (16848431769).

320120203231 is a wasteful number, since it uses less digits than its factorization.

320120203231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16848431768.

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

Adding to 320120203231 its reverse (132302021023), we get a palindrome (452422224254).

The spelling of 320120203231 in words is "three hundred twenty billion, one hundred twenty million, two hundred three thousand, two hundred thirty-one".