321144105150220 has 96 divisors (see below), whose sum is σ = 741114841110336. Its totient is φ = 115923513139200.

The previous prime is 321144105150203. The next prime is 321144105150221. The reversal of 321144105150220 is 22051501441123.

It is not an unprimeable number, because it can be changed into a prime (321144105150221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31179460 + ... + 40180180.

It is an arithmetic number, because the mean of its divisors is an integer number (7719946261566).

Almost surely, 2^{321144105150220} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321144105150220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370557420555168).

321144105150220 is an abundant number, since it is smaller than the sum of its proper divisors (419970735960116).

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

321144105150220 is a wasteful number, since it uses less digits than its factorization.

321144105150220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9001931 (or 9001929 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 321144105150220 its reverse (22051501441123), we get a palindrome (343195606591343).

The spelling of 321144105150220 in words is "three hundred twenty-one trillion, one hundred forty-four billion, one hundred five million, one hundred fifty thousand, two hundred twenty".