200234021021 has 2 divisors, whose sum is σ = 200234021022. Its totient is φ = 200234021020.

The previous prime is 200234020999. The next prime is 200234021027. The reversal of 200234021021 is 120120432002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188170293796 + 12063727225 = 433786^2 + 109835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200234021021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200234021027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100117010510 + 100117010511.

It is an arithmetic number, because the mean of its divisors is an integer number (100117010511).

Almost surely, 2^200234021021 is an apocalyptic number.

It is an amenable number.

200234021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

200234021021 is an equidigital number, since it uses as much as digits as its factorization.

200234021021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 200234021021 its reverse (120120432002), we get a palindrome (320354453023).

The spelling of 200234021021 in words is "two hundred billion, two hundred thirty-four million, twenty-one thousand, twenty-one".