200201000000021 has 2 divisors, whose sum is σ = 200201000000022. Its totient is φ = 200201000000020.

The previous prime is 200200999999999. The next prime is 200201000000047. The reversal of 200201000000021 is 120000000102002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189357249789796 + 10843750210225 = 13760714^2 + 3292985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200201000000021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200200999999945 and 200201000000008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200201005000021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100100500000010 + 100100500000011.

It is an arithmetic number, because the mean of its divisors is an integer number (100100500000011).

Almost surely, 2^{200201000000021} is an apocalyptic number.

It is an amenable number.

200201000000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

200201000000021 is an equidigital number, since it uses as much as digits as its factorization.

200201000000021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 200201000000021 its reverse (120000000102002), we get a palindrome (320201000102023).

The spelling of 200201000000021 in words is "two hundred trillion, two hundred one billion, twenty-one", and thus it is an aban number.