1212122103817 has 2 divisors, whose sum is σ = 1212122103818. Its totient is φ = 1212122103816.

The previous prime is 1212122103793. The next prime is 1212122103889. The reversal of 1212122103817 is 7183012212121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 872348528016 + 339773575801 = 933996^2 + 582901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212122103817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212122103917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606061051908 + 606061051909.

It is an arithmetic number, because the mean of its divisors is an integer number (606061051909).

Almost surely, 2^{1212122103817} is an apocalyptic number.

It is an amenable number.

1212122103817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212122103817 is an equidigital number, since it uses as much as digits as its factorization.

1212122103817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 31.

Adding to 1212122103817 its reverse (7183012212121), we get a palindrome (8395134315938).

The spelling of 1212122103817 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred three thousand, eight hundred seventeen".