321211320120013 has 4 divisors (see below), whose sum is σ = 323338547405728. Its totient is φ = 319084092834300.

The previous prime is 321211320119947. The next prime is 321211320120037. The reversal of 321211320120013 is 310021023112123.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321211320120013 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 (321211320120043) 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, 1063613642631 + ... + 1063613642932.

It is an arithmetic number, because the mean of its divisors is an integer number (80834636851432).

Almost surely, 2^{321211320120013} is an apocalyptic number.

It is an amenable number.

321211320120013 is a deficient number, since it is larger than the sum of its proper divisors (2127227285715).

321211320120013 is a wasteful number, since it uses less digits than its factorization.

321211320120013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127227285714.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 321211320120013 its reverse (310021023112123), we get a palindrome (631232343232136).

The spelling of 321211320120013 in words is "three hundred twenty-one trillion, two hundred eleven billion, three hundred twenty million, one hundred twenty thousand, thirteen".