200200202021 has 2 divisors, whose sum is σ = 200200202022. Its totient is φ = 200200202020.

The previous prime is 200200201979. The next prime is 200200202071. The reversal of 200200202021 is 120202002002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120513122500 + 79687079521 = 347150^2 + 282289^2 .

It is a cyclic number.

It is not a de Polignac number, because 200200202021 - 2²² = 200196007717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200200201993 and 200200202011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200200202071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100100101010 + 100100101011.

It is an arithmetic number, because the mean of its divisors is an integer number (100100101011).

Almost surely, 2^200200202021 is an apocalyptic number.

It is an amenable number.

200200202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

200200202021 is an equidigital number, since it uses as much as digits as its factorization.

200200202021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 200200202021 its reverse (120202002002), we get a palindrome (320402204023).

The spelling of 200200202021 in words is "two hundred billion, two hundred million, two hundred two thousand, twenty-one".