321120131321 has 16 divisors (see below), whose sum is σ = 355926555648. Its totient is φ = 287265056400.

The previous prime is 321120131309. The next prime is 321120131329. The reversal of 321120131321 is 123131021123.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 321120131321 - 2¹⁸ = 321119869177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321120131293 and 321120131302.

It is not an unprimeable number, because it can be changed into a prime (321120131329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15380 + ... + 801546.

It is an arithmetic number, because the mean of its divisors is an integer number (22245409728).

Almost surely, 2^321120131321 is an apocalyptic number.

It is an amenable number.

321120131321 is a deficient number, since it is larger than the sum of its proper divisors (34806424327).

321120131321 is a wasteful number, since it uses less digits than its factorization.

321120131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786772.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 321120131321 its reverse (123131021123), we get a palindrome (444251152444).

The spelling of 321120131321 in words is "three hundred twenty-one billion, one hundred twenty million, one hundred thirty-one thousand, three hundred twenty-one".