200200000020021 has 12 divisors (see below), whose sum is σ = 306188235324972. Its totient is φ = 125615686286976.

The previous prime is 200200000019977. The next prime is 200200000020029. The reversal of 200200000020021 is 120020000002002.

200200000020021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 57151558818225 + 143048441201796 = 7559865^2 + 11960286^2 .

It is not a de Polignac number, because 200200000020021 - 2¹¹ = 200200000017973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 200200000019985 and 200200000020012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200200000020029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 654248365926 + ... + 654248366231.

It is an arithmetic number, because the mean of its divisors is an integer number (25515686277081).

Almost surely, 2^{200200000020021} is an apocalyptic number.

It is an amenable number.

200200000020021 is a deficient number, since it is larger than the sum of its proper divisors (105988235304951).

200200000020021 is a wasteful number, since it uses less digits than its factorization.

200200000020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308496732180 (or 1308496732177 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 200200000020021 its reverse (120020000002002), we get a palindrome (320220000022023).

The spelling of 200200000020021 in words is "two hundred trillion, two hundred billion, twenty thousand, twenty-one".