320120320111 has 4 divisors (see below), whose sum is σ = 320123237632. Its totient is φ = 320117402592.

The previous prime is 320120320103. The next prime is 320120320153. The reversal of 320120320111 is 111023021023.

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 320120320111 - 2³ = 320120320103 is a prime.

It is a super-2 number, since 2×320120320111² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320120320511) 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 3 ways as a sum of consecutive naturals, for example, 1287471 + ... + 1515856.

It is an arithmetic number, because the mean of its divisors is an integer number (80030809408).

Almost surely, 2^320120320111 is an apocalyptic number.

320120320111 is a deficient number, since it is larger than the sum of its proper divisors (2917521).

320120320111 is a wasteful number, since it uses less digits than its factorization.

320120320111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2917520.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 320120320111 its reverse (111023021023), we get a palindrome (431143341134).

The spelling of 320120320111 in words is "three hundred twenty billion, one hundred twenty million, three hundred twenty thousand, one hundred eleven".