321130223221 has 4 divisors (see below), whose sum is σ = 321493904992. Its totient is φ = 320766541452.

The previous prime is 321130223207. The next prime is 321130223263. The reversal of 321130223221 is 122322031123.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122322031123 = 85103 ⋅1437341.

It is a cyclic number.

It is not a de Polignac number, because 321130223221 - 2⁷ = 321130223093 is a prime.

It is a super-2 number, since 2×321130223221² (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 = 321130223192 and 321130223201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321130223521) 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, 181839561 + ... + 181841326.

It is an arithmetic number, because the mean of its divisors is an integer number (80373476248).

Almost surely, 2^321130223221 is an apocalyptic number.

It is an amenable number.

321130223221 is a deficient number, since it is larger than the sum of its proper divisors (363681771).

321130223221 is an equidigital number, since it uses as much as digits as its factorization.

321130223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363681770.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 321130223221 its reverse (122322031123), we get a palindrome (443452254344).

The spelling of 321130223221 in words is "three hundred twenty-one billion, one hundred thirty million, two hundred twenty-three thousand, two hundred twenty-one".