1216040011 has 2 divisors, whose sum is σ = 1216040012. Its totient is φ = 1216040010.

The previous prime is 1216039991. The next prime is 1216040029. The reversal of 1216040011 is 1100406121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216040011 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216040041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608020005 + 608020006.

It is an arithmetic number, because the mean of its divisors is an integer number (608020006).

Almost surely, 2^1216040011 is an apocalyptic number.

1216040011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216040011 is an equidigital number, since it uses as much as digits as its factorization.

1216040011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1216040011 is about 34871.7652406643. The cubic root of 1216040011 is about 1067.3723660949.

Adding to 1216040011 its reverse (1100406121), we get a palindrome (2316446132).

The spelling of 1216040011 in words is "one billion, two hundred sixteen million, forty thousand, eleven".