321321223221 has 8 divisors (see below), whose sum is σ = 429357645024. Its totient is φ = 213749475120.

The previous prime is 321321223183. The next prime is 321321223229. The reversal of 321321223221 is 122322123123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 321321223221 - 2¹⁷ = 321321092149 is a prime.

It is a super-2 number, since 2×321321223221² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321321223191 and 321321223200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321321223229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116166811 + ... + 116169576.

It is an arithmetic number, because the mean of its divisors is an integer number (53669705628).

Almost surely, 2^321321223221 is an apocalyptic number.

It is an amenable number.

321321223221 is a deficient number, since it is larger than the sum of its proper divisors (108036421803).

321321223221 is a wasteful number, since it uses less digits than its factorization.

321321223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232336851.

The product of its digits is 1728, while the sum is 24.

Adding to 321321223221 its reverse (122322123123), we get a palindrome (443643346344).

The spelling of 321321223221 in words is "three hundred twenty-one billion, three hundred twenty-one million, two hundred twenty-three thousand, two hundred twenty-one".