1223130326161 has 2 divisors, whose sum is σ = 1223130326162. Its totient is φ = 1223130326160.

The previous prime is 1223130326153. The next prime is 1223130326267. The reversal of 1223130326161 is 1616230313221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1185975450625 + 37154875536 = 1089025^2 + 192756^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223130326161 - 2³ = 1223130326153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223110326161) 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, 611565163080 + 611565163081.

It is an arithmetic number, because the mean of its divisors is an integer number (611565163081).

Almost surely, 2^{1223130326161} is an apocalyptic number.

It is an amenable number.

1223130326161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223130326161 is an equidigital number, since it uses as much as digits as its factorization.

1223130326161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 1223130326161 its reverse (1616230313221), we get a palindrome (2839360639382).

The spelling of 1223130326161 in words is "one trillion, two hundred twenty-three billion, one hundred thirty million, three hundred twenty-six thousand, one hundred sixty-one".