200121007 has 2 divisors, whose sum is σ = 200121008. Its totient is φ = 200121006.

The previous prime is 200121001. The next prime is 200121013. The reversal of 200121007 is 700121002.

It is a balanced prime because it is at equal distance from previous prime (200121001) and next prime (200121013).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200121007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200121001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060503 + 100060504.

It is an arithmetic number, because the mean of its divisors is an integer number (100060504).

Almost surely, 2^200121007 is an apocalyptic number.

200121007 is a deficient number, since it is larger than the sum of its proper divisors (1).

200121007 is an equidigital number, since it uses as much as digits as its factorization.

200121007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 200121007 is about 14146.4132203184. The cubic root of 200121007 is about 584.9214660690.

Adding to 200121007 its reverse (700121002), we get a palindrome (900242009).

The spelling of 200121007 in words is "two hundred million, one hundred twenty-one thousand, seven".