2221320320020 has 12 divisors (see below), whose sum is σ = 4664772672084. Its totient is φ = 888528128000.

The previous prime is 2221320319979. The next prime is 2221320320047. The reversal of 2221320320020 is 200230231222.

It can be written as a sum of positive squares in 2 ways, for example, as 314617784464 + 1906702535556 = 560908^2 + 1380834^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2221320320020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55533007981 + ... + 55533008020.

It is an arithmetic number, because the mean of its divisors is an integer number (388731056007).

Almost surely, 2^{2221320320020} is an apocalyptic number.

2221320320020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221320320020 is an abundant number, since it is smaller than the sum of its proper divisors (2443452352064).

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

2221320320020 is a wasteful number, since it uses less digits than its factorization.

2221320320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111066016010 (or 111066016008 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 2221320320020 its reverse (200230231222), we get a palindrome (2421550551242).

The spelling of 2221320320020 in words is "two trillion, two hundred twenty-one billion, three hundred twenty million, three hundred twenty thousand, twenty".