200200221022121 has 4 divisors (see below), whose sum is σ = 201475381665732. Its totient is φ = 198925060378512.

The previous prime is 200200221022103. The next prime is 200200221022189. The reversal of 200200221022121 is 121220122002002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71948310595225 + 128251910426896 = 8482235^2 + 11324836^2 .

It is a cyclic number.

It is not a de Polignac number, because 200200221022121 - 2¹⁸ = 200200220759977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 200200221022121.

It is not an unprimeable number, because it can be changed into a prime (200200224022121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637580321570 + ... + 637580321883.

It is an arithmetic number, because the mean of its divisors is an integer number (50368845416433).

Almost surely, 2^{200200221022121} is an apocalyptic number.

It is an amenable number.

200200221022121 is a deficient number, since it is larger than the sum of its proper divisors (1275160643611).

200200221022121 is a wasteful number, since it uses less digits than its factorization.

200200221022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275160643610.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 200200221022121 its reverse (121220122002002), we get a palindrome (321420343024123).

The spelling of 200200221022121 in words is "two hundred trillion, two hundred billion, two hundred twenty-one million, twenty-two thousand, one hundred twenty-one".