200121133 has 4 divisors (see below), whose sum is σ = 200251548. Its totient is φ = 199990720.

The previous prime is 200121113. The next prime is 200121169. The reversal of 200121133 is 331121002.

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 33143049 + 166978084 = 5757^2 + 12922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200121133 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 (200121113) 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, 62878 + ... + 65983.

It is an arithmetic number, because the mean of its divisors is an integer number (50062887).

Almost surely, 2^200121133 is an apocalyptic number.

It is an amenable number.

200121133 is a deficient number, since it is larger than the sum of its proper divisors (130415).

200121133 is a wasteful number, since it uses less digits than its factorization.

200121133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130414.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 200121133 is about 14146.4176737434. The cubic root of 200121133 is about 584.9215888282.

Adding to 200121133 its reverse (331121002), we get a palindrome (531242135).

The spelling of 200121133 in words is "two hundred million, one hundred twenty-one thousand, one hundred thirty-three".