200200921 has 2 divisors, whose sum is σ = 200200922. Its totient is φ = 200200920.

The previous prime is 200200879. The next prime is 200200927. The reversal of 200200921 is 129002002.

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., 169520400 + 30680521 = 13020^2 + 5539^2 .

It is a cyclic number.

It is not a de Polignac number, because 200200921 - 2²⁷ = 65983193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200200895 and 200200904.

It is not a weakly prime, because it can be changed into another prime (200200927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100100460 + 100100461.

It is an arithmetic number, because the mean of its divisors is an integer number (100100461).

Almost surely, 2^200200921 is an apocalyptic number.

It is an amenable number.

200200921 is a deficient number, since it is larger than the sum of its proper divisors (1).

200200921 is an equidigital number, since it uses as much as digits as its factorization.

200200921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 200200921 is about 14149.2374706201. The cubic root of 200200921 is about 584.9993142905. Note that the first 3 decimals are identical.

Adding to 200200921 its reverse (129002002), we get a palindrome (329202923).

The spelling of 200200921 in words is "two hundred million, two hundred thousand, nine hundred twenty-one".