200611421 has 2 divisors, whose sum is σ = 200611422. Its totient is φ = 200611420.

The previous prime is 200611417. The next prime is 200611459. The reversal of 200611421 is 124116002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102799321 + 97812100 = 10139^2 + 9890^2 .

It is a cyclic number.

It is not a de Polignac number, because 200611421 - 2² = 200611417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200611421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200611321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100305710 + 100305711.

It is an arithmetic number, because the mean of its divisors is an integer number (100305711).

Almost surely, 2^200611421 is an apocalyptic number.

It is an amenable number.

200611421 is a deficient number, since it is larger than the sum of its proper divisors (1).

200611421 is an equidigital number, since it uses as much as digits as its factorization.

200611421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 200611421 is about 14163.7361243423. The cubic root of 200611421 is about 585.3988766761.

Adding to 200611421 its reverse (124116002), we get a palindrome (324727423).

The spelling of 200611421 in words is "two hundred million, six hundred eleven thousand, four hundred twenty-one".