1216112159 has 2 divisors, whose sum is σ = 1216112160. Its totient is φ = 1216112158.

The previous prime is 1216112123. The next prime is 1216112167. The reversal of 1216112159 is 9512116121.

It is a strong prime.

It is an emirp because it is prime and its reverse (9512116121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1216112159 - 2¹² = 1216108063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216112179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608056079 + 608056080.

It is an arithmetic number, because the mean of its divisors is an integer number (608056080).

Almost surely, 2^1216112159 is an apocalyptic number.

1216112159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216112159 is an equidigital number, since it uses as much as digits as its factorization.

1216112159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 29.

The square root of 1216112159 is about 34872.7997011998. The cubic root of 1216112159 is about 1067.3934748462.

The spelling of 1216112159 in words is "one billion, two hundred sixteen million, one hundred twelve thousand, one hundred fifty-nine".