1216105441 has 2 divisors, whose sum is σ = 1216105442. Its totient is φ = 1216105440.

The previous prime is 1216105367. The next prime is 1216105453. The reversal of 1216105441 is 1445016121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1206520225 + 9585216 = 34735^2 + 3096^2 .

It is an emirp because it is prime and its reverse (1445016121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1216105441 - 2¹³ = 1216097249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216105741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608052720 + 608052721.

It is an arithmetic number, because the mean of its divisors is an integer number (608052721).

Almost surely, 2^1216105441 is an apocalyptic number.

It is an amenable number.

1216105441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216105441 is an equidigital number, since it uses as much as digits as its factorization.

1216105441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1216105441 is about 34872.7033795776. The cubic root of 1216105441 is about 1067.3915093579.

The spelling of 1216105441 in words is "one billion, two hundred sixteen million, one hundred five thousand, four hundred forty-one".