200204123244421 has 2 divisors, whose sum is σ = 200204123244422. Its totient is φ = 200204123244420.

The previous prime is 200204123244347. The next prime is 200204123244431. The reversal of 200204123244421 is 124442321402002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198501019943521 + 1703103300900 = 14089039^2 + 1305030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200204123244421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200204123244431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100102061622210 + 100102061622211.

It is an arithmetic number, because the mean of its divisors is an integer number (100102061622211).

Almost surely, 2^{200204123244421} is an apocalyptic number.

It is an amenable number.

200204123244421 is a deficient number, since it is larger than the sum of its proper divisors (1).

200204123244421 is an equidigital number, since it uses as much as digits as its factorization.

200204123244421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 200204123244421 its reverse (124442321402002), we get a palindrome (324646444646423).

The spelling of 200204123244421 in words is "two hundred trillion, two hundred four billion, one hundred twenty-three million, two hundred forty-four thousand, four hundred twenty-one".