2221200020 has 24 divisors (see below), whose sum is σ = 5023329864. Its totient is φ = 820135296.

The previous prime is 2221200017. The next prime is 2221200031. The reversal of 2221200020 is 200021222.

It can be written as a sum of positive squares in 4 ways, for example, as 83247376 + 2137952644 = 9124^2 + 46238^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2221199974 and 2221200010.

It is a congruent number.

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, 4271279 + ... + 4271798.

It is an arithmetic number, because the mean of its divisors is an integer number (209305411).

Almost surely, 2^2221200020 is an apocalyptic number.

2221200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221200020 is an abundant number, since it is smaller than the sum of its proper divisors (2802129844).

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

2221200020 is a wasteful number, since it uses less digits than its factorization.

2221200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8543099 (or 8543097 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 2221200020 is about 47129.6087401540. The cubic root of 2221200020 is about 1304.7557603819.

Adding to 2221200020 its reverse (200021222), we get a palindrome (2421221242).

The spelling of 2221200020 in words is "two billion, two hundred twenty-one million, two hundred thousand, twenty".