200001121221221 has 8 divisors (see below), whose sum is σ = 200882811874080. Its totient is φ = 199119436081488.

The previous prime is 200001121221211. The next prime is 200001121221233. The reversal of 200001121221221 is 122122121100002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 200001121221221 - 2¹⁸ = 200001120959077 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 200001121221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200001121221211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82584575 + ... + 84971843.

It is an arithmetic number, because the mean of its divisors is an integer number (25110351484260).

Almost surely, 2^{200001121221221} is an apocalyptic number.

It is an amenable number.

200001121221221 is a deficient number, since it is larger than the sum of its proper divisors (881690652859).

200001121221221 is a wasteful number, since it uses less digits than its factorization.

200001121221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756563.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 200001121221221 its reverse (122122121100002), we get a palindrome (322123242321223).

The spelling of 200001121221221 in words is "two hundred trillion, one billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-one".