2221000020020 has 12 divisors (see below), whose sum is σ = 4664100042084. Its totient is φ = 888400008000.

The previous prime is 2221000020013. The next prime is 2221000020037. The reversal of 2221000020020 is 200200001222.

It can be written as a sum of positive squares in 2 ways, for example, as 1177472392996 + 1043527627024 = 1085114^2 + 1021532^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2221000019983 and 2221000020010.

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, 55525000481 + ... + 55525000520.

It is an arithmetic number, because the mean of its divisors is an integer number (388675003507).

Almost surely, 2^{2221000020020} is an apocalyptic number.

2221000020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221000020020 is an abundant number, since it is smaller than the sum of its proper divisors (2443100022064).

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

2221000020020 is a wasteful number, since it uses less digits than its factorization.

2221000020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111050001010 (or 111050001008 counting only the distinct ones).

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

Adding to 2221000020020 its reverse (200200001222), we get a palindrome (2421200021242).

The spelling of 2221000020020 in words is "two trillion, two hundred twenty-one billion, twenty thousand, twenty".