321533404021123 has 4 divisors (see below), whose sum is σ = 367466747452720. Its totient is φ = 275600060589528.

The previous prime is 321533404021103. The next prime is 321533404021169. The reversal of 321533404021123 is 321120404335123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321533404021123 - 2⁵ = 321533404021091 is a prime.

It is a super-2 number, since 2×321533404021123² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321533404021103) 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, 22966671715788 + ... + 22966671715801.

It is an arithmetic number, because the mean of its divisors is an integer number (91866686863180).

Almost surely, 2^{321533404021123} is an apocalyptic number.

321533404021123 is a deficient number, since it is larger than the sum of its proper divisors (45933343431597).

321533404021123 is an equidigital number, since it uses as much as digits as its factorization.

321533404021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45933343431596.

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 321533404021123 its reverse (321120404335123), we get a palindrome (642653808356246).

The spelling of 321533404021123 in words is "three hundred twenty-one trillion, five hundred thirty-three billion, four hundred four million, twenty-one thousand, one hundred twenty-three".