1216601063 has 16 divisors (see below), whose sum is σ = 1276853760. Its totient is φ = 1158210816.

The previous prime is 1216601047. The next prime is 1216601081. The reversal of 1216601063 is 3601066121.

It is a cyclic number.

It is not a de Polignac number, because 1216601063 - 2⁴ = 1216601047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216601963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266720 + ... + 271242.

It is an arithmetic number, because the mean of its divisors is an integer number (79803360).

Almost surely, 2^1216601063 is an apocalyptic number.

1216601063 is a deficient number, since it is larger than the sum of its proper divisors (60252697).

1216601063 is an equidigital number, since it uses as much as digits as its factorization.

1216601063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4726.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1216601063 is about 34879.8088154164. The cubic root of 1216601063 is about 1067.5364942815.

Adding to 1216601063 its reverse (3601066121), we get a palindrome (4817667184).

The spelling of 1216601063 in words is "one billion, two hundred sixteen million, six hundred one thousand, sixty-three".