200131121 has 2 divisors, whose sum is σ = 200131122. Its totient is φ = 200131120.

The previous prime is 200131111. The next prime is 200131153. The reversal of 200131121 is 121131002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132250000 + 67881121 = 11500^2 + 8239^2 .

It is a cyclic number.

It is not a de Polignac number, because 200131121 - 2²⁶ = 133022257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (200131111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100065560 + 100065561.

It is an arithmetic number, because the mean of its divisors is an integer number (100065561).

Almost surely, 2^200131121 is an apocalyptic number.

It is an amenable number.

200131121 is a deficient number, since it is larger than the sum of its proper divisors (1).

200131121 is an equidigital number, since it uses as much as digits as its factorization.

200131121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 200131121 is about 14146.7706915748. The cubic root of 200131121 is about 584.9313197672.

Adding to 200131121 its reverse (121131002), we get a palindrome (321262123).

The spelling of 200131121 in words is "two hundred million, one hundred thirty-one thousand, one hundred twenty-one".