321213020111 has 4 divisors (see below), whose sum is σ = 321222386424. Its totient is φ = 321203653800.

The previous prime is 321213020081. The next prime is 321213020159. The reversal of 321213020111 is 111020312123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111020312123 = 7 ⋅15860044589.

It is a cyclic number.

It is not a de Polignac number, because 321213020111 - 2⁶ = 321213020047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321213020111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321213026111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4631525 + ... + 4700366.

It is an arithmetic number, because the mean of its divisors is an integer number (80305596606).

Almost surely, 2^321213020111 is an apocalyptic number.

321213020111 is a deficient number, since it is larger than the sum of its proper divisors (9366313).

321213020111 is an equidigital number, since it uses as much as digits as its factorization.

321213020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9366312.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 321213020111 its reverse (111020312123), we get a palindrome (432233332234).

The spelling of 321213020111 in words is "three hundred twenty-one billion, two hundred thirteen million, twenty thousand, one hundred eleven".