12621133410161 has 2 divisors, whose sum is σ = 12621133410162. Its totient is φ = 12621133410160.

The previous prime is 12621133410143. The next prime is 12621133410269. The reversal of 12621133410161 is 16101433112621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12543504305761 + 77629104400 = 3541681^2 + 278620^2 .

It is a cyclic number.

It is not a de Polignac number, because 12621133410161 - 2¹⁴ = 12621133393777 is a prime.

It is not a weakly prime, because it can be changed into another prime (12621133410961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6310566705080 + 6310566705081.

It is an arithmetic number, because the mean of its divisors is an integer number (6310566705081).

Almost surely, 2^{12621133410161} is an apocalyptic number.

It is an amenable number.

12621133410161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12621133410161 is an equidigital number, since it uses as much as digits as its factorization.

12621133410161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

Adding to 12621133410161 its reverse (16101433112621), we get a palindrome (28722566522782).

The spelling of 12621133410161 in words is "twelve trillion, six hundred twenty-one billion, one hundred thirty-three million, four hundred ten thousand, one hundred sixty-one".