200121200210209 has 4 divisors (see below), whose sum is σ = 203108083795504. Its totient is φ = 197134316624916.

The previous prime is 200121200210203. The next prime is 200121200210221. The reversal of 200121200210209 is 902012002121002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 200121200210209 - 2³ = 200121200210201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200121200210209.

It is not an unprimeable number, because it can be changed into a prime (200121200210201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1493441792547 + ... + 1493441792680.

It is an arithmetic number, because the mean of its divisors is an integer number (50777020948876).

Almost surely, 2^{200121200210209} is an apocalyptic number.

It is an amenable number.

200121200210209 is a deficient number, since it is larger than the sum of its proper divisors (2986883585295).

200121200210209 is an equidigital number, since it uses as much as digits as its factorization.

200121200210209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986883585294.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 200121200210209 in words is "two hundred trillion, one hundred twenty-one billion, two hundred million, two hundred ten thousand, two hundred nine".