200444332421 has 2 divisors, whose sum is σ = 200444332422. Its totient is φ = 200444332420.

The previous prime is 200444332369. The next prime is 200444332427. The reversal of 200444332421 is 124233444002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111886905025 + 88557427396 = 334495^2 + 297586^2 .

It is a cyclic number.

It is not a de Polignac number, because 200444332421 - 2³⁰ = 199370590597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200444332427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100222166210 + 100222166211.

It is an arithmetic number, because the mean of its divisors is an integer number (100222166211).

Almost surely, 2^200444332421 is an apocalyptic number.

It is an amenable number.

200444332421 is a deficient number, since it is larger than the sum of its proper divisors (1).

200444332421 is an equidigital number, since it uses as much as digits as its factorization.

200444332421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 200444332421 its reverse (124233444002), we get a palindrome (324677776423).

The spelling of 200444332421 in words is "two hundred billion, four hundred forty-four million, three hundred thirty-two thousand, four hundred twenty-one".