321112223221 has 4 divisors (see below), whose sum is σ = 322125195852. Its totient is φ = 320099250592.

The previous prime is 321112223209. The next prime is 321112223231. The reversal of 321112223221 is 122322211123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71126223025 + 249986000196 = 266695^2 + 499986^2 .

It is a cyclic number.

It is not a de Polignac number, because 321112223221 - 2⁵ = 321112223189 is a prime.

It is a super-2 number, since 2×321112223221² (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 = 321112223192 and 321112223201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321112223231) 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, 506485840 + ... + 506486473.

It is an arithmetic number, because the mean of its divisors is an integer number (80531298963).

Almost surely, 2^321112223221 is an apocalyptic number.

It is an amenable number.

321112223221 is a deficient number, since it is larger than the sum of its proper divisors (1012972631).

321112223221 is a wasteful number, since it uses less digits than its factorization.

321112223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012972630.

The product of its digits is 576, while the sum is 22.

Adding to 321112223221 its reverse (122322211123), we get a palindrome (443434434344).

The spelling of 321112223221 in words is "three hundred twenty-one billion, one hundred twelve million, two hundred twenty-three thousand, two hundred twenty-one".