321110112321220 has 12 divisors (see below), whose sum is σ = 674331235874604. Its totient is φ = 128444044928480.

The previous prime is 321110112321161. The next prime is 321110112321221. The reversal of 321110112321220 is 22123211011123.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64082074296384 + 257028038024836 = 8005128^2 + 16032094^2 .

It is a super-2 number, since 2×321110112321220² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321110112321191 and 321110112321200.

It is not an unprimeable number, because it can be changed into a prime (321110112321221) 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, 8027752808011 + ... + 8027752808050.

It is an arithmetic number, because the mean of its divisors is an integer number (56194269656217).

Almost surely, 2^{321110112321220} is an apocalyptic number.

It is an amenable number.

321110112321220 is an abundant number, since it is smaller than the sum of its proper divisors (353221123553384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321110112321220 is a wasteful number, since it uses less digits than its factorization.

321110112321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16055505616070 (or 16055505616068 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 321110112321220 its reverse (22123211011123), we get a palindrome (343233323332343).

The spelling of 321110112321220 in words is "three hundred twenty-one trillion, one hundred ten billion, one hundred twelve million, three hundred twenty-one thousand, two hundred twenty".