321131020321 has 8 divisors (see below), whose sum is σ = 322846891784. Its totient is φ = 319415685120.

The previous prime is 321131020319. The next prime is 321131020423. The reversal of 321131020321 is 123020131123.

It can be written as a sum of positive squares in 4 ways, for example, as 3667513600 + 317463506721 = 60560^2 + 563439^2 .

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 321131020321 - 2¹ = 321131020319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321131050321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1096885 + ... + 1358461.

It is an arithmetic number, because the mean of its divisors is an integer number (40355861473).

Almost surely, 2^321131020321 is an apocalyptic number.

It is an amenable number.

321131020321 is a deficient number, since it is larger than the sum of its proper divisors (1715871463).

321131020321 is a wasteful number, since it uses less digits than its factorization.

321131020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268131.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 321131020321 its reverse (123020131123), we get a palindrome (444151151444).

The spelling of 321131020321 in words is "three hundred twenty-one billion, one hundred thirty-one million, twenty thousand, three hundred twenty-one".