1212031302161 has 2 divisors, whose sum is σ = 1212031302162. Its totient is φ = 1212031302160.

The previous prime is 1212031302113. The next prime is 1212031302187. The reversal of 1212031302161 is 1612031302121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1146216478225 + 65814823936 = 1070615^2 + 256544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212031302161 - 2¹⁰ = 1212031301137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212031302101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606015651080 + 606015651081.

It is an arithmetic number, because the mean of its divisors is an integer number (606015651081).

Almost surely, 2^{1212031302161} is an apocalyptic number.

It is an amenable number.

1212031302161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212031302161 is an equidigital number, since it uses as much as digits as its factorization.

1212031302161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 1212031302161 its reverse (1612031302121), we get a palindrome (2824062604282).

The spelling of 1212031302161 in words is "one trillion, two hundred twelve billion, thirty-one million, three hundred two thousand, one hundred sixty-one".