1217001217 has 8 divisors (see below), whose sum is σ = 1230184872. Its totient is φ = 1203840000.

The previous prime is 1217001209. The next prime is 1217001223. The reversal of 1217001217 is 7121007121.

It can be written as a sum of positive squares in 4 ways, for example, as 739622416 + 477378801 = 27196^2 + 21849^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1217001217 - 2³ = 1217001209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1217001257) 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 7 ways as a sum of consecutive naturals, for example, 117967 + ... + 127867.

It is an arithmetic number, because the mean of its divisors is an integer number (153773109).

Almost surely, 2^1217001217 is an apocalyptic number.

It is an amenable number.

1217001217 is a deficient number, since it is larger than the sum of its proper divisors (13183655).

1217001217 is a wasteful number, since it uses less digits than its factorization.

1217001217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11219.

The product of its (nonzero) digits is 196, while the sum is 22.

The square root of 1217001217 is about 34885.5445277840. The cubic root of 1217001217 is about 1067.6535231047.

Adding to 1217001217 its reverse (7121007121), we get a palindrome (8338008338).

It can be divided in two parts, 121700 and 1217, that multiplied together give a square (148108900 = 12170²).

The spelling of 1217001217 in words is "one billion, two hundred seventeen million, one thousand, two hundred seventeen".