321320311133 has 4 divisors (see below), whose sum is σ = 321738153660. Its totient is φ = 320902468608.

The previous prime is 321320311111. The next prime is 321320311139. The reversal of 321320311133 is 331113023123.

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 139889464324 + 181430846809 = 374018^2 + 425947^2 .

It is a cyclic number.

It is not a de Polignac number, because 321320311133 - 2²⁴ = 321303533917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321320311099 and 321320311108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321320311139) 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, 208920110 + ... + 208921647.

It is an arithmetic number, because the mean of its divisors is an integer number (80434538415).

Almost surely, 2^321320311133 is an apocalyptic number.

It is an amenable number.

321320311133 is a deficient number, since it is larger than the sum of its proper divisors (417842527).

321320311133 is an equidigital number, since it uses as much as digits as its factorization.

321320311133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417842526.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 321320311133 its reverse (331113023123), we get a palindrome (652433334256).

The spelling of 321320311133 in words is "three hundred twenty-one billion, three hundred twenty million, three hundred eleven thousand, one hundred thirty-three".