200411421521 has 2 divisors, whose sum is σ = 200411421522. Its totient is φ = 200411421520.

The previous prime is 200411421481. The next prime is 200411421527. The reversal of 200411421521 is 125124114002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199183690000 + 1227731521 = 446300^2 + 35039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200411421521 is a prime.

It is not a weakly prime, because it can be changed into another prime (200411421527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100205710760 + 100205710761.

It is an arithmetic number, because the mean of its divisors is an integer number (100205710761).

Almost surely, 2^200411421521 is an apocalyptic number.

It is an amenable number.

200411421521 is a deficient number, since it is larger than the sum of its proper divisors (1).

200411421521 is an equidigital number, since it uses as much as digits as its factorization.

200411421521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 200411421521 its reverse (125124114002), we get a palindrome (325535535523).

The spelling of 200411421521 in words is "two hundred billion, four hundred eleven million, four hundred twenty-one thousand, five hundred twenty-one".