200020121221 has 8 divisors (see below), whose sum is σ = 200184191424. Its totient is φ = 199856099520.

The previous prime is 200020121183. The next prime is 200020121321. The reversal of 200020121221 is 122121020002.

It is a happy number.

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 200020121221 - 2²⁵ = 199986566789 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 (200020121321) 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, 17523006 + ... + 17534416.

It is an arithmetic number, because the mean of its divisors is an integer number (25023023928).

Almost surely, 2^200020121221 is an apocalyptic number.

It is an amenable number.

200020121221 is a deficient number, since it is larger than the sum of its proper divisors (164070203).

200020121221 is a wasteful number, since it uses less digits than its factorization.

200020121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24251.

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

Adding to 200020121221 its reverse (122121020002), we get a palindrome (322141141223).

The spelling of 200020121221 in words is "two hundred billion, twenty million, one hundred twenty-one thousand, two hundred twenty-one".