200321210197 has 2 divisors, whose sum is σ = 200321210198. Its totient is φ = 200321210196.

The previous prime is 200321210171. The next prime is 200321210207. The reversal of 200321210197 is 791012123002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170630129476 + 29691080721 = 413074^2 + 172311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200321210197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200321210137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100160605098 + 100160605099.

It is an arithmetic number, because the mean of its divisors is an integer number (100160605099).

Almost surely, 2^200321210197 is an apocalyptic number.

It is an amenable number.

200321210197 is a deficient number, since it is larger than the sum of its proper divisors (1).

200321210197 is an equidigital number, since it uses as much as digits as its factorization.

200321210197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

Adding to 200321210197 its reverse (791012123002), we get a palindrome (991333333199).

The spelling of 200321210197 in words is "two hundred billion, three hundred twenty-one million, two hundred ten thousand, one hundred ninety-seven".