321123232021 has 4 divisors (see below), whose sum is σ = 321124372992. Its totient is φ = 321122091052.

The previous prime is 321123231971. The next prime is 321123232057. The reversal of 321123232021 is 120232321123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 120232321123 = 1217 ⋅98794019.

It is a cyclic number.

It is not a de Polignac number, because 321123232021 - 2⁷ = 321123231893 is a prime.

It is a super-2 number, since 2×321123232021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321123231983 and 321123232001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321123233021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186540 + ... + 822826.

It is an arithmetic number, because the mean of its divisors is an integer number (80281093248).

Almost surely, 2^321123232021 is an apocalyptic number.

It is an amenable number.

321123232021 is a deficient number, since it is larger than the sum of its proper divisors (1140971).

321123232021 is an equidigital number, since it uses as much as digits as its factorization.

321123232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140970.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 321123232021 its reverse (120232321123), we get a palindrome (441355553144).

The spelling of 321123232021 in words is "three hundred twenty-one billion, one hundred twenty-three million, two hundred thirty-two thousand, twenty-one".