11309211691 has 2 divisors, whose sum is σ = 11309211692. Its totient is φ = 11309211690.

The previous prime is 11309211679. The next prime is 11309211701. The reversal of 11309211691 is 19611290311.

It is a strong prime.

It is an emirp because it is prime and its reverse (19611290311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11309211691 - 2¹¹ = 11309209643 is a prime.

It is not a weakly prime, because it can be changed into another prime (11300211691) 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, 5654605845 + 5654605846.

It is an arithmetic number, because the mean of its divisors is an integer number (5654605846).

Almost surely, 2^11309211691 is an apocalyptic number.

11309211691 is a deficient number, since it is larger than the sum of its proper divisors (1).

11309211691 is an equidigital number, since it uses as much as digits as its factorization.

11309211691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 34.

The spelling of 11309211691 in words is "eleven billion, three hundred nine million, two hundred eleven thousand, six hundred ninety-one".