1216634411 has 2 divisors, whose sum is σ = 1216634412. Its totient is φ = 1216634410.

The previous prime is 1216634387. The next prime is 1216634413. The reversal of 1216634411 is 1144366121.

It is a strong prime.

It is an emirp because it is prime and its reverse (1144366121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1216634411 - 2¹⁴ = 1216618027 is a prime.

Together with 1216634413, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1216634413) 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 as a sum of consecutive naturals, namely, 608317205 + 608317206.

It is an arithmetic number, because the mean of its divisors is an integer number (608317206).

Almost surely, 2^1216634411 is an apocalyptic number.

1216634411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216634411 is an equidigital number, since it uses as much as digits as its factorization.

1216634411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 1216634411 is about 34880.2868537516. The cubic root of 1216634411 is about 1067.5462481997.

The spelling of 1216634411 in words is "one billion, two hundred sixteen million, six hundred thirty-four thousand, four hundred eleven".