11215209671 has 2 divisors, whose sum is σ = 11215209672. Its totient is φ = 11215209670.

The previous prime is 11215209661. The next prime is 11215209751. The reversal of 11215209671 is 17690251211.

It is a happy number.

11215209671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11215209671 - 2¹⁰ = 11215208647 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11215209661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5607604835 + 5607604836.

It is an arithmetic number, because the mean of its divisors is an integer number (5607604836).

Almost surely, 2^11215209671 is an apocalyptic number.

11215209671 is a deficient number, since it is larger than the sum of its proper divisors (1).

11215209671 is an equidigital number, since it uses as much as digits as its factorization.

11215209671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 35.

The spelling of 11215209671 in words is "eleven billion, two hundred fifteen million, two hundred nine thousand, six hundred seventy-one".