200120230221721 has 2 divisors, whose sum is σ = 200120230221722. Its totient is φ = 200120230221720.

The previous prime is 200120230221707. The next prime is 200120230221727. The reversal of 200120230221721 is 127122032021002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178430820840000 + 21689409381721 = 13357800^2 + 4657189^2 .

It is a cyclic number.

It is not a de Polignac number, because 200120230221721 - 2⁹ = 200120230221209 is a prime.

It is not a weakly prime, because it can be changed into another prime (200120230221727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060115110860 + 100060115110861.

It is an arithmetic number, because the mean of its divisors is an integer number (100060115110861).

Almost surely, 2^{200120230221721} is an apocalyptic number.

It is an amenable number.

200120230221721 is a deficient number, since it is larger than the sum of its proper divisors (1).

200120230221721 is an equidigital number, since it uses as much as digits as its factorization.

200120230221721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 200120230221721 its reverse (127122032021002), we get a palindrome (327242262242723).

The spelling of 200120230221721 in words is "two hundred trillion, one hundred twenty billion, two hundred thirty million, two hundred twenty-one thousand, seven hundred twenty-one".