1216216424317 has 2 divisors, whose sum is σ = 1216216424318. Its totient is φ = 1216216424316.

The previous prime is 1216216424261. The next prime is 1216216424363. The reversal of 1216216424317 is 7134246126121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1131608740441 + 84607683876 = 1063771^2 + 290874^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216216424317 - 2¹⁵ = 1216216391549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1216216424317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216216424377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608108212158 + 608108212159.

It is an arithmetic number, because the mean of its divisors is an integer number (608108212159).

Almost surely, 2^{1216216424317} is an apocalyptic number.

It is an amenable number.

1216216424317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216216424317 is an equidigital number, since it uses as much as digits as its factorization.

1216216424317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The spelling of 1216216424317 in words is "one trillion, two hundred sixteen billion, two hundred sixteen million, four hundred twenty-four thousand, three hundred seventeen".