200134021 has 4 divisors (see below), whose sum is σ = 200188044. Its totient is φ = 200080000.

The previous prime is 200134003. The next prime is 200134027. The reversal of 200134021 is 120431002.

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 62188996 + 137945025 = 7886^2 + 11745^2 .

It is a cyclic number.

It is not a de Polignac number, because 200134021 - 2⁷ = 200133893 is a prime.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200133992 and 200134010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200134027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21010 + ... + 29011.

It is an arithmetic number, because the mean of its divisors is an integer number (50047011).

Almost surely, 2^200134021 is an apocalyptic number.

It is an amenable number.

200134021 is a deficient number, since it is larger than the sum of its proper divisors (54023).

200134021 is an equidigital number, since it uses as much as digits as its factorization.

200134021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54022.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 200134021 is about 14146.8731880935. The cubic root of 200134021 is about 584.9341450694.

Adding to 200134021 its reverse (120431002), we get a palindrome (320565023).

The spelling of 200134021 in words is "two hundred million, one hundred thirty-four thousand, twenty-one".