200121 has 8 divisors (see below), whose sum is σ = 273504. Its totient is φ = 130080.

The previous prime is 200117. The next prime is 200131. The reversal of 200121 is 121002.

It is a happy number.

200121 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 200121 - 2² = 200117 is a prime.

200121 is strictly pandigital in base 7.

It is a Curzon number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (200131) 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, 691 + ... + 936.

It is an arithmetic number, because the mean of its divisors is an integer number (34188).

2²⁰⁰¹²¹ is an apocalyptic number.

It is an amenable number.

200121 is a deficient number, since it is larger than the sum of its proper divisors (73383).

200121 is a wasteful number, since it uses less digits than its factorization.

200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 200121 is about 447.3488571574. The cubic root of 200121 is about 58.4921459249.

Adding to 200121 its reverse (121002), we get a palindrome (321123).

The spelling of 200121 in words is "two hundred thousand, one hundred twenty-one", and thus it is an iban number.