1226310865121 has 2 divisors, whose sum is σ = 1226310865122. Its totient is φ = 1226310865120.

The previous prime is 1226310865099. The next prime is 1226310865139. The reversal of 1226310865121 is 1215680136221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 882305154721 + 344005710400 = 939311^2 + 586520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226310865121 - 2¹⁸ = 1226310602977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1226310865151) 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, 613155432560 + 613155432561.

It is an arithmetic number, because the mean of its divisors is an integer number (613155432561).

Almost surely, 2^{1226310865121} is an apocalyptic number.

It is an amenable number.

1226310865121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226310865121 is an equidigital number, since it uses as much as digits as its factorization.

1226310865121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 1226310865121 in words is "one trillion, two hundred twenty-six billion, three hundred ten million, eight hundred sixty-five thousand, one hundred twenty-one".