1216340340737 has 2 divisors, whose sum is σ = 1216340340738. Its totient is φ = 1216340340736.

The previous prime is 1216340340679. The next prime is 1216340340751. The reversal of 1216340340737 is 7370430436121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1101609779776 + 114730560961 = 1049576^2 + 338719^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216340340737 - 2¹⁸ = 1216340078593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1216340340694 and 1216340340703.

It is not a weakly prime, because it can be changed into another prime (1216340340937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608170170368 + 608170170369.

It is an arithmetic number, because the mean of its divisors is an integer number (608170170369).

Almost surely, 2^{1216340340737} is an apocalyptic number.

It is an amenable number.

1216340340737 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216340340737 is an equidigital number, since it uses as much as digits as its factorization.

1216340340737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 41.

Adding to 1216340340737 its reverse (7370430436121), we get a palindrome (8586770776858).

The spelling of 1216340340737 in words is "one trillion, two hundred sixteen billion, three hundred forty million, three hundred forty thousand, seven hundred thirty-seven".