321203343012021 has 6 divisors (see below), whose sum is σ = 463960384350710. Its totient is φ = 214135562008008.

The previous prime is 321203343012001. The next prime is 321203343012037. The reversal of 321203343012021 is 120210343302123.

321203343012021 is a `hidden beast` number, since 3 + 2 + 1 + 2 + 0 + 334 + 301 + 2 + 0 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 193169275146225 + 128034067865796 = 13898535^2 + 11315214^2 .

It is not a de Polignac number, because 321203343012021 - 2¹⁹ = 321203342487733 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 (321203343012001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17844630167326 + ... + 17844630167343.

Almost surely, 2^{321203343012021} is an apocalyptic number.

It is an amenable number.

321203343012021 is a deficient number, since it is larger than the sum of its proper divisors (142757041338689).

321203343012021 is a wasteful number, since it uses less digits than its factorization.

321203343012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35689260334675 (or 35689260334672 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 321203343012021 its reverse (120210343302123), we get a palindrome (441413686314144).

The spelling of 321203343012021 in words is "three hundred twenty-one trillion, two hundred three billion, three hundred forty-three million, twelve thousand, twenty-one".