2220221321320 has 32 divisors (see below), whose sum is σ = 5044958358120. Its totient is φ = 879295571200.

The previous prime is 2220221321261. The next prime is 2220221321321. The reversal of 2220221321320 is 231231220222.

It can be written as a sum of positive squares in 4 ways, for example, as 1808912021764 + 411309299556 = 1344958^2 + 641334^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2220221321291 and 2220221321300.

It is not an unprimeable number, because it can be changed into a prime (2220221321321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274775827 + ... + 274783906.

Almost surely, 2^{2220221321320} is an apocalyptic number.

2220221321320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2220221321320 is an abundant number, since it is smaller than the sum of its proper divisors (2824737036800).

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

2220221321320 is a wasteful number, since it uses less digits than its factorization.

2220221321320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549559845 (or 549559841 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 2220221321320 its reverse (231231220222), we get a palindrome (2451452541542).

The spelling of 2220221321320 in words is "two trillion, two hundred twenty billion, two hundred twenty-one million, three hundred twenty-one thousand, three hundred twenty".