200200000121221 has 4 divisors (see below), whose sum is σ = 200584261158444. Its totient is φ = 199815739084000.

The previous prime is 200200000121213. The next prime is 200200000121243. The reversal of 200200000121221 is 122121000002002.

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 79846484290596 + 120353515830625 = 8935686^2 + 10970575^2 .

It is a cyclic number.

It is not a de Polignac number, because 200200000121221 - 2³ = 200200000121213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200200000121281) 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, 192130517830 + ... + 192130518871.

It is an arithmetic number, because the mean of its divisors is an integer number (50146065289611).

Almost surely, 2^{200200000121221} is an apocalyptic number.

It is an amenable number.

200200000121221 is a deficient number, since it is larger than the sum of its proper divisors (384261037223).

200200000121221 is an equidigital number, since it uses as much as digits as its factorization.

200200000121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384261037222.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 200200000121221 its reverse (122121000002002), we get a palindrome (322321000123223).

The spelling of 200200000121221 in words is "two hundred trillion, two hundred billion, one hundred twenty-one thousand, two hundred twenty-one".