2200202020021 has 4 divisors (see below), whose sum is σ = 2202962625612. Its totient is φ = 2197441414432.

The previous prime is 2200202020001. The next prime is 2200202020087. The reversal of 2200202020021 is 1200202020022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 751187957521 + 1449014062500 = 866711^2 + 1203750^2 .

It is a cyclic number.

It is not a de Polignac number, because 2200202020021 - 2⁵ = 2200202019989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2200202019983 and 2200202020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2200202020001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380301600 + ... + 1380303193.

It is an arithmetic number, because the mean of its divisors is an integer number (550740656403).

Almost surely, 2^{2200202020021} is an apocalyptic number.

It is an amenable number.

2200202020021 is a deficient number, since it is larger than the sum of its proper divisors (2760605591).

2200202020021 is an equidigital number, since it uses as much as digits as its factorization.

2200202020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760605590.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 2200202020021 its reverse (1200202020022), we get a palindrome (3400404040043).

Subtracting from 2200202020021 its reverse (1200202020022), we obtain a palindrome (999999999999).

The spelling of 2200202020021 in words is "two trillion, two hundred billion, two hundred two million, twenty thousand, twenty-one".