200200121221 has 8 divisors (see below), whose sum is σ = 200311858584. Its totient is φ = 200088422400.

The previous prime is 200200121213. The next prime is 200200121269. The reversal of 200200121221 is 122121002002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23720312196 + 176479809025 = 154014^2 + 420095^2 .

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 200200121221 - 2³ = 200200121213 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 (200200121321) 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, 19362165 + ... + 19372501.

It is an arithmetic number, because the mean of its divisors is an integer number (25038982323).

Almost surely, 2^200200121221 is an apocalyptic number.

It is an amenable number.

200200121221 is a deficient number, since it is larger than the sum of its proper divisors (111737363).

200200121221 is a wasteful number, since it uses less digits than its factorization.

200200121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19271.

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

Adding to 200200121221 its reverse (122121002002), we get a palindrome (322321123223).

The spelling of 200200121221 in words is "two hundred billion, two hundred million, one hundred twenty-one thousand, two hundred twenty-one".