1216012017 has 16 divisors (see below), whose sum is σ = 1769398272. Its totient is φ = 736704720.

The previous prime is 1216012009. The next prime is 1216012033. The reversal of 1216012017 is 7102106121.

It is a happy number.

It is not a de Polignac number, because 1216012017 - 2³ = 1216012009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1216011984 and 1216012002.

It is not an unprimeable number, because it can be changed into a prime (1216012037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118048 + ... + 127934.

It is an arithmetic number, because the mean of its divisors is an integer number (110587392).

Almost surely, 2^1216012017 is an apocalyptic number.

It is an amenable number.

1216012017 is a deficient number, since it is larger than the sum of its proper divisors (553386255).

1216012017 is a wasteful number, since it uses less digits than its factorization.

1216012017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13628.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 1216012017 is about 34871.3638534543. The cubic root of 1216012017 is about 1067.3641755060.

Adding to 1216012017 its reverse (7102106121), we get a palindrome (8318118138).

The spelling of 1216012017 in words is "one billion, two hundred sixteen million, twelve thousand, seventeen".