1200200161 has 2 divisors, whose sum is σ = 1200200162. Its totient is φ = 1200200160.

The previous prime is 1200200149. The next prime is 1200200171. The reversal of 1200200161 is 1610020021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 691427025 + 508773136 = 26295^2 + 22556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200200161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200200101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600100080 + 600100081.

It is an arithmetic number, because the mean of its divisors is an integer number (600100081).

Almost surely, 2^1200200161 is an apocalyptic number.

It is an amenable number.

1200200161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200200161 is an equidigital number, since it uses as much as digits as its factorization.

1200200161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1200200161 is about 34643.9051060933. The cubic root of 1200200161 is about 1062.7176500095.

Adding to 1200200161 its reverse (1610020021), we get a palindrome (2810220182).

The spelling of 1200200161 in words is "one billion, two hundred million, two hundred thousand, one hundred sixty-one".