200421234289 has 2 divisors, whose sum is σ = 200421234290. Its totient is φ = 200421234288.

The previous prime is 200421234199. The next prime is 200421234331. The reversal of 200421234289 is 982432124002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108435197025 + 91986037264 = 329295^2 + 303292^2 .

It is a cyclic number.

It is not a de Polignac number, because 200421234289 - 2¹¹ = 200421232241 is a prime.

It is not a weakly prime, because it can be changed into another prime (200421234089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100210617144 + 100210617145.

It is an arithmetic number, because the mean of its divisors is an integer number (100210617145).

Almost surely, 2^200421234289 is an apocalyptic number.

It is an amenable number.

200421234289 is a deficient number, since it is larger than the sum of its proper divisors (1).

200421234289 is an equidigital number, since it uses as much as digits as its factorization.

200421234289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 200421234289 in words is "two hundred billion, four hundred twenty-one million, two hundred thirty-four thousand, two hundred eighty-nine".