1216114243 has 4 divisors (see below), whose sum is σ = 1245775608. Its totient is φ = 1186452880.

The previous prime is 1216114241. The next prime is 1216114279. The reversal of 1216114243 is 3424116121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3424116121 = 131 ⋅26138291.

It is a cyclic number.

It is not a de Polignac number, because 1216114243 - 2¹ = 1216114241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216114241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14830621 + ... + 14830702.

It is an arithmetic number, because the mean of its divisors is an integer number (311443902).

Almost surely, 2^1216114243 is an apocalyptic number.

1216114243 is a deficient number, since it is larger than the sum of its proper divisors (29661365).

1216114243 is an equidigital number, since it uses as much as digits as its factorization.

1216114243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29661364.

The product of its digits is 1152, while the sum is 25.

The square root of 1216114243 is about 34872.8295812083. The cubic root of 1216114243 is about 1067.3940845615.

The spelling of 1216114243 in words is "one billion, two hundred sixteen million, one hundred fourteen thousand, two hundred forty-three".