200001202121 has 32 divisors (see below), whose sum is σ = 246307184640. Its totient is φ = 158559980544.

The previous prime is 200001202073. The next prime is 200001202129. The reversal of 200001202121 is 121202100002.

It is a happy number.

It is not a de Polignac number, because 200001202121 - 2¹⁴ = 200001185737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200001202129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15738056 + ... + 15750758.

It is an arithmetic number, because the mean of its divisors is an integer number (7697099520).

Almost surely, 2^200001202121 is an apocalyptic number.

It is an amenable number.

200001202121 is a deficient number, since it is larger than the sum of its proper divisors (46305982519).

200001202121 is a wasteful number, since it uses less digits than its factorization.

200001202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15525.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 200001202121 its reverse (121202100002), we get a palindrome (321203302123).

The spelling of 200001202121 in words is "two hundred billion, one million, two hundred two thousand, one hundred twenty-one".