1216103217 has 24 divisors (see below), whose sum is σ = 1887840000. Its totient is φ = 694312416.

The previous prime is 1216103201. The next prime is 1216103233. The reversal of 1216103217 is 7123016121.

It is an interprime number because it is at equal distance from previous prime (1216103201) and next prime (1216103233).

It is not a de Polignac number, because 1216103217 - 2⁴ = 1216103201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216103237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 208659 + ... + 214407.

It is an arithmetic number, because the mean of its divisors is an integer number (78660000).

Almost surely, 2^1216103217 is an apocalyptic number.

It is an amenable number.

1216103217 is a deficient number, since it is larger than the sum of its proper divisors (671736783).

1216103217 is a wasteful number, since it uses less digits than its factorization.

1216103217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7205 (or 7198 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 1216103217 is about 34872.6714921584. The cubic root of 1216103217 is about 1067.3908586796.

Adding to 1216103217 its reverse (7123016121), we get a palindrome (8339119338).

The spelling of 1216103217 in words is "one billion, two hundred sixteen million, one hundred three thousand, two hundred seventeen".