321122311021 has 4 divisors (see below), whose sum is σ = 325645160544. Its totient is φ = 316599461500.

The previous prime is 321122311001. The next prime is 321122311051. The reversal of 321122311021 is 120113221123.

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 not a de Polignac number, because 321122311021 - 2⁷ = 321122310893 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 321122311021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321122311001) 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, 2261424655 + ... + 2261424796.

It is an arithmetic number, because the mean of its divisors is an integer number (81411290136).

Almost surely, 2^321122311021 is an apocalyptic number.

It is an amenable number.

321122311021 is a deficient number, since it is larger than the sum of its proper divisors (4522849523).

321122311021 is an equidigital number, since it uses as much as digits as its factorization.

321122311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522849522.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 321122311021 its reverse (120113221123), we get a palindrome (441235532144).

The spelling of 321122311021 in words is "three hundred twenty-one billion, one hundred twenty-two million, three hundred eleven thousand, twenty-one".