201044442421 has 2 divisors, whose sum is σ = 201044442422. Its totient is φ = 201044442420.

The previous prime is 201044442413. The next prime is 201044442433. The reversal of 201044442421 is 124244440102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201013239025 + 31203396 = 448345^2 + 5586^2 .

It is a cyclic number.

It is not a de Polignac number, because 201044442421 - 2³ = 201044442413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201044442421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201044412421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100522221210 + 100522221211.

It is an arithmetic number, because the mean of its divisors is an integer number (100522221211).

Almost surely, 2^201044442421 is an apocalyptic number.

It is an amenable number.

201044442421 is a deficient number, since it is larger than the sum of its proper divisors (1).

201044442421 is an equidigital number, since it uses as much as digits as its factorization.

201044442421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 201044442421 its reverse (124244440102), we get a palindrome (325288882523).

The spelling of 201044442421 in words is "two hundred one billion, forty-four million, four hundred forty-two thousand, four hundred twenty-one".