200121000222221 has 24 divisors (see below), whose sum is σ = 219470801326560. Its totient is φ = 182376075400896.

The previous prime is 200121000222193. The next prime is 200121000222259. The reversal of 200121000222221 is 122222000121002.

It is a happy number.

It is not a de Polignac number, because 200121000222221 - 2³⁸ = 199846122315277 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 200121000222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121000222421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13587011 + ... + 24183648.

It is an arithmetic number, because the mean of its divisors is an integer number (9144616721940).

Almost surely, 2^{200121000222221} is an apocalyptic number.

It is an amenable number.

200121000222221 is a deficient number, since it is larger than the sum of its proper divisors (19349801104339).

200121000222221 is a wasteful number, since it uses less digits than its factorization.

200121000222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37771085 (or 37771072 counting only the distinct ones).

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

Adding to 200121000222221 its reverse (122222000121002), we get a palindrome (322343000343223).

The spelling of 200121000222221 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty-two thousand, two hundred twenty-one".