11211671 has 2 divisors, whose sum is σ = 11211672. Its totient is φ = 11211670.

The previous prime is 11211667. The next prime is 11211689. The reversal of 11211671 is 17611211.

It is a happy number.

11211671 is digitally balanced in base 3, 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 11211671 - 2² = 11211667 is a prime.

It is a super-2 number, since 2×11211671² = 251403133224482, which contains 22 as substring.

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 (11211071) 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, 5605835 + 5605836.

It is an arithmetic number, because the mean of its divisors is an integer number (5605836).

Almost surely, 2^11211671 is an apocalyptic number.

11211671 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211671 is an equidigital number, since it uses as much as digits as its factorization.

11211671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 20.

The square root of 11211671 is about 3348.3833412559. The cubic root of 11211671 is about 223.8154770245.

Adding to 11211671 its reverse (17611211), we get a palindrome (28822882).

The spelling of 11211671 in words is "eleven million, two hundred eleven thousand, six hundred seventy-one".