323211311321021 has 4 divisors (see below), whose sum is σ = 327638863530972. Its totient is φ = 318783759111072.

The previous prime is 323211311321009. The next prime is 323211311321023. The reversal of 323211311321021 is 120123113112323.

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 123348455875225 + 199862855445796 = 11106235^2 + 14137286^2 .

It is a cyclic number.

It is not a de Polignac number, because 323211311321021 - 2²² = 323211307126717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323211311321023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2213776104866 + ... + 2213776105011.

It is an arithmetic number, because the mean of its divisors is an integer number (81909715882743).

Almost surely, 2^{323211311321021} is an apocalyptic number.

It is an amenable number.

323211311321021 is a deficient number, since it is larger than the sum of its proper divisors (4427552209951).

323211311321021 is an equidigital number, since it uses as much as digits as its factorization.

323211311321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427552209950.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 323211311321021 its reverse (120123113112323), we get a palindrome (443334424433344).

The spelling of 323211311321021 in words is "three hundred twenty-three trillion, two hundred eleven billion, three hundred eleven million, three hundred twenty-one thousand, twenty-one".