200010000111821 has 2 divisors, whose sum is σ = 200010000111822. Its totient is φ = 200010000111820.

The previous prime is 200010000111781. The next prime is 200010000111881. The reversal of 200010000111821 is 128111000010002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170362900754596 + 29647099357225 = 13052314^2 + 5444915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200010000111821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200010000111821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200010000111881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100005000055910 + 100005000055911.

It is an arithmetic number, because the mean of its divisors is an integer number (100005000055911).

Almost surely, 2^{200010000111821} is an apocalyptic number.

It is an amenable number.

200010000111821 is a deficient number, since it is larger than the sum of its proper divisors (1).

200010000111821 is an equidigital number, since it uses as much as digits as its factorization.

200010000111821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 200010000111821 its reverse (128111000010002), we get a palindrome (328121000121823).

The spelling of 200010000111821 in words is "two hundred trillion, ten billion, one hundred eleven thousand, eight hundred twenty-one".