321100213220 has 12 divisors (see below), whose sum is σ = 674310447804. Its totient is φ = 128440085280.

The previous prime is 321100213207. The next prime is 321100213223. The reversal of 321100213220 is 22312001123.

It can be written as a sum of positive squares in 2 ways, for example, as 32952414784 + 288147798436 = 181528^2 + 536794^2 .

It is not an unprimeable number, because it can be changed into a prime (321100213223) 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 3 ways as a sum of consecutive naturals, for example, 8027505311 + ... + 8027505350.

It is an arithmetic number, because the mean of its divisors is an integer number (56192537317).

Almost surely, 2^321100213220 is an apocalyptic number.

It is an amenable number.

321100213220 is an abundant number, since it is smaller than the sum of its proper divisors (353210234584).

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

321100213220 is a wasteful number, since it uses less digits than its factorization.

321100213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16055010670 (or 16055010668 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 321100213220 its reverse (22312001123), we get a palindrome (343412214343).

The spelling of 321100213220 in words is "three hundred twenty-one billion, one hundred million, two hundred thirteen thousand, two hundred twenty".