200021200021 has 16 divisors (see below), whose sum is σ = 203616806400. Its totient is φ = 196459560000.

The previous prime is 200021199979. The next prime is 200021200037. The reversal of 200021200021 is 120002120002.

It is a cyclic number.

It is not a de Polignac number, because 200021200021 - 2²⁵ = 199987645589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200021199980 and 200021200007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021200081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20197171 + ... + 20207071.

It is an arithmetic number, because the mean of its divisors is an integer number (12726050400).

Almost surely, 2^200021200021 is an apocalyptic number.

It is an amenable number.

200021200021 is a deficient number, since it is larger than the sum of its proper divisors (3595606379).

200021200021 is a wasteful number, since it uses less digits than its factorization.

200021200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11580.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 200021200021 its reverse (120002120002), we get a palindrome (320023320023).

It can be divided in two parts, 20002 and 1200021, that multiplied together give a palindrome (24002820042).

The spelling of 200021200021 in words is "two hundred billion, twenty-one million, two hundred thousand, twenty-one".