2221320444220 has 48 divisors (see below), whose sum is σ = 4779517555008. Its totient is φ = 866680855040.

The previous prime is 2221320444199. The next prime is 2221320444223. The reversal of 2221320444220 is 224440231222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221320444223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3805497 + ... + 4350223.

It is an arithmetic number, because the mean of its divisors is an integer number (99573282396).

Almost surely, 2^{2221320444220} is an apocalyptic number.

2221320444220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221320444220 is an abundant number, since it is smaller than the sum of its proper divisors (2558197110788).

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

2221320444220 is a wasteful number, since it uses less digits than its factorization.

2221320444220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549750 (or 549748 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 2221320444220 its reverse (224440231222), we get a palindrome (2445760675442).

The spelling of 2221320444220 in words is "two trillion, two hundred twenty-one billion, three hundred twenty million, four hundred forty-four thousand, two hundred twenty".