3221312001220 has 24 divisors (see below), whose sum is σ = 6998022624600. Its totient is φ = 1244092910592.

The previous prime is 3221312001169. The next prime is 3221312001221. The reversal of 3221312001220 is 221002131223.

It can be written as a sum of positive squares in 4 ways, for example, as 757014844356 + 2464297156864 = 870066^2 + 1569808^2 .

It is not an unprimeable number, because it can be changed into a prime (3221312001221) 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, 2776992525 + ... + 2776993684.

It is an arithmetic number, because the mean of its divisors is an integer number (291584276025).

Almost surely, 2^{3221312001220} is an apocalyptic number.

It is an amenable number.

3221312001220 is an abundant number, since it is smaller than the sum of its proper divisors (3776710623380).

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

3221312001220 is a wasteful number, since it uses less digits than its factorization.

3221312001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5553986247 (or 5553986245 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 3221312001220 its reverse (221002131223), we get a palindrome (3442314132443).

The spelling of 3221312001220 in words is "three trillion, two hundred twenty-one billion, three hundred twelve million, one thousand, two hundred twenty".