1203120161 has 2 divisors, whose sum is σ = 1203120162. Its totient is φ = 1203120160.

The previous prime is 1203120143. The next prime is 1203120169. The reversal of 1203120161 is 1610213021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1056250000 + 146870161 = 32500^2 + 12119^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203120161 - 2⁶ = 1203120097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1203120169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601560080 + 601560081.

It is an arithmetic number, because the mean of its divisors is an integer number (601560081).

Almost surely, 2^1203120161 is an apocalyptic number.

It is an amenable number.

1203120161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203120161 is an equidigital number, since it uses as much as digits as its factorization.

1203120161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1203120161 is about 34686.0225595268. The cubic root of 1203120161 is about 1063.5787903611.

Adding to 1203120161 its reverse (1610213021), we get a palindrome (2813333182).

The spelling of 1203120161 in words is "one billion, two hundred three million, one hundred twenty thousand, one hundred sixty-one".