2221203021220 has 24 divisors (see below), whose sum is σ = 4664567073600. Its totient is φ = 888473450592.

The previous prime is 2221203021187. The next prime is 2221203021281. The reversal of 2221203021220 is 221203021222.

It is a super-2 number, since 2×2221203021220² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2235051 + ... + 3072109.

It is an arithmetic number, because the mean of its divisors is an integer number (194356961400).

Almost surely, 2^{2221203021220} is an apocalyptic number.

2221203021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221203021220 is an abundant number, since it is smaller than the sum of its proper divisors (2443364052380).

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

2221203021220 is a wasteful number, since it uses less digits than its factorization.

2221203021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969747 (or 969745 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 2221203021220 its reverse (221203021222), we get a palindrome (2442406042442).

The spelling of 2221203021220 in words is "two trillion, two hundred twenty-one billion, two hundred three million, twenty-one thousand, two hundred twenty".