200020000002021 has 16 divisors (see below), whose sum is σ = 311922027294400. Its totient is φ = 126328421053584.

The previous prime is 200020000002001. The next prime is 200020000002029. The reversal of 200020000002021 is 120200000020002.

It is not a de Polignac number, because 200020000002021 - 2⁶ = 200020000001957 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200020000001994 and 200020000002012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200020000002029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194951266546 + ... + 194951267571.

It is an arithmetic number, because the mean of its divisors is an integer number (19495126705900).

Almost surely, 2^{200020000002021} is an apocalyptic number.

It is an amenable number.

200020000002021 is a deficient number, since it is larger than the sum of its proper divisors (111902027292379).

200020000002021 is a wasteful number, since it uses less digits than its factorization.

200020000002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389902534145 (or 389902534139 counting only the distinct ones).

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

Adding to 200020000002021 its reverse (120200000020002), we get a palindrome (320220000022023).

The spelling of 200020000002021 in words is "two hundred trillion, twenty billion, two thousand, twenty-one".