320529819121 has 8 divisors (see below), whose sum is σ = 321190608200. Its totient is φ = 319869665280.

The previous prime is 320529819119. The next prime is 320529819271. The reversal of 320529819121 is 121918925023.

It can be written as a sum of positive squares in 4 ways, for example, as 21036311521 + 299493507600 = 145039^2 + 547260^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320529819121 - 2¹ = 320529819119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320529819521) 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 7 ways as a sum of consecutive naturals, for example, 858085 + ... + 1173613.

It is an arithmetic number, because the mean of its divisors is an integer number (40148826025).

Almost surely, 2^320529819121 is an apocalyptic number.

It is an amenable number.

320529819121 is a deficient number, since it is larger than the sum of its proper divisors (660789079).

320529819121 is a wasteful number, since it uses less digits than its factorization.

320529819121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317619.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 320529819121 in words is "three hundred twenty billion, five hundred twenty-nine million, eight hundred nineteen thousand, one hundred twenty-one".