12946220731061 has 2 divisors, whose sum is σ = 12946220731062. Its totient is φ = 12946220731060.

The previous prime is 12946220731001. The next prime is 12946220731069. The reversal of 12946220731061 is 16013702264921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12057603428836 + 888617302225 = 3472406^2 + 942665^2 .

It is a cyclic number.

It is not a de Polignac number, because 12946220731061 - 2⁴² = 8548174219957 is a prime.

It is a super-2 number, since 2×12946220731061² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12946220731069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6473110365530 + 6473110365531.

It is an arithmetic number, because the mean of its divisors is an integer number (6473110365531).

Almost surely, 2^{12946220731061} is an apocalyptic number.

It is an amenable number.

12946220731061 is a deficient number, since it is larger than the sum of its proper divisors (1).

12946220731061 is an equidigital number, since it uses as much as digits as its factorization.

12946220731061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

Adding to 12946220731061 its reverse (16013702264921), we get a palindrome (28959922995982).

The spelling of 12946220731061 in words is "twelve trillion, nine hundred forty-six billion, two hundred twenty million, seven hundred thirty-one thousand, sixty-one".