320120312003 has 4 divisors (see below), whose sum is σ = 322159295040. Its totient is φ = 318081328968.

The previous prime is 320120311999. The next prime is 320120312023. The reversal of 320120312003 is 300213021023.

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 320120312003 - 2² = 320120311999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320120312023) 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, 1019491283 + ... + 1019491596.

It is an arithmetic number, because the mean of its divisors is an integer number (80539823760).

Almost surely, 2^320120312003 is an apocalyptic number.

320120312003 is a deficient number, since it is larger than the sum of its proper divisors (2038983037).

320120312003 is a wasteful number, since it uses less digits than its factorization.

320120312003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038983036.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 320120312003 its reverse (300213021023), we get a palindrome (620333333026).

The spelling of 320120312003 in words is "three hundred twenty billion, one hundred twenty million, three hundred twelve thousand, three".