200321011721 has 2 divisors, whose sum is σ = 200321011722. Its totient is φ = 200321011720.

The previous prime is 200321011699. The next prime is 200321011739. The reversal of 200321011721 is 127110123002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139230474496 + 61090537225 = 373136^2 + 247165^2 .

It is a cyclic number.

It is not a de Polignac number, because 200321011721 - 2³⁴ = 183141142537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200321011693 and 200321011702.

It is not a weakly prime, because it can be changed into another prime (200321011321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100160505860 + 100160505861.

It is an arithmetic number, because the mean of its divisors is an integer number (100160505861).

Almost surely, 2^200321011721 is an apocalyptic number.

It is an amenable number.

200321011721 is a deficient number, since it is larger than the sum of its proper divisors (1).

200321011721 is an equidigital number, since it uses as much as digits as its factorization.

200321011721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 200321011721 its reverse (127110123002), we get a palindrome (327431134723).

The spelling of 200321011721 in words is "two hundred billion, three hundred twenty-one million, eleven thousand, seven hundred twenty-one".