320312003131121 has 4 divisors (see below), whose sum is σ = 320554480046244. Its totient is φ = 320069526216000.

The previous prime is 320312003131097. The next prime is 320312003131123. The reversal of 320312003131121 is 121131300213023.

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

It can be written as a sum of positive squares in 2 ways, for example, as 253282004906896 + 67029998224225 = 15914836^2 + 8187185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320312003131121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320312003131123) 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, 121238455580 + ... + 121238458221.

It is an arithmetic number, because the mean of its divisors is an integer number (80138620011561).

Almost surely, 2^{320312003131121} is an apocalyptic number.

It is an amenable number.

320312003131121 is a deficient number, since it is larger than the sum of its proper divisors (242476915123).

320312003131121 is a wasteful number, since it uses less digits than its factorization.

320312003131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242476915122.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 320312003131121 its reverse (121131300213023), we get a palindrome (441443303344144).

The spelling of 320312003131121 in words is "three hundred twenty trillion, three hundred twelve billion, three million, one hundred thirty-one thousand, one hundred twenty-one".