321145133321 has 2 divisors, whose sum is σ = 321145133322. Its totient is φ = 321145133320.

The previous prime is 321145133297. The next prime is 321145133329. The reversal of 321145133321 is 123331541123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183530844025 + 137614289296 = 428405^2 + 370964^2 .

It is a cyclic number.

It is not a de Polignac number, because 321145133321 - 2³⁸ = 46267226377 is a prime.

It is not a weakly prime, because it can be changed into another prime (321145133329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160572566660 + 160572566661.

It is an arithmetic number, because the mean of its divisors is an integer number (160572566661).

Almost surely, 2^321145133321 is an apocalyptic number.

It is an amenable number.

321145133321 is a deficient number, since it is larger than the sum of its proper divisors (1).

321145133321 is an equidigital number, since it uses as much as digits as its factorization.

321145133321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

Adding to 321145133321 its reverse (123331541123), we get a palindrome (444476674444).

The spelling of 321145133321 in words is "three hundred twenty-one billion, one hundred forty-five million, one hundred thirty-three thousand, three hundred twenty-one".