3221320031220 has 48 divisors (see below), whose sum is σ = 9020637154368. Its totient is φ = 858929049600.

The previous prime is 3221320031131. The next prime is 3221320031221. The reversal of 3221320031220 is 221300231223.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221320031221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2219934 + ... + 3372053.

It is an arithmetic number, because the mean of its divisors is an integer number (187929940716).

Almost surely, 2^{3221320031220} is an apocalyptic number.

3221320031220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3221320031220 is an abundant number, since it is smaller than the sum of its proper divisors (5799317123148).

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

3221320031220 is a wasteful number, since it uses less digits than its factorization.

3221320031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5601600 (or 5601598 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 3221320031220 its reverse (221300231223), we get a palindrome (3442620262443).

The spelling of 3221320031220 in words is "three trillion, two hundred twenty-one billion, three hundred twenty million, thirty-one thousand, two hundred twenty".