1222110985817 has 2 divisors, whose sum is σ = 1222110985818. Its totient is φ = 1222110985816.

The previous prime is 1222110985757. The next prime is 1222110985829. The reversal of 1222110985817 is 7185890112221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1216159017616 + 5951968201 = 1102796^2 + 77149^2 .

It is an emirp because it is prime and its reverse (7185890112221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222110985817 - 2¹⁰ = 1222110984793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222112985817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611055492908 + 611055492909.

It is an arithmetic number, because the mean of its divisors is an integer number (611055492909).

Almost surely, 2^{1222110985817} is an apocalyptic number.

It is an amenable number.

1222110985817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222110985817 is an equidigital number, since it uses as much as digits as its factorization.

1222110985817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 47.

The spelling of 1222110985817 in words is "one trillion, two hundred twenty-two billion, one hundred ten million, nine hundred eighty-five thousand, eight hundred seventeen".