11121671 has 8 divisors (see below), whose sum is σ = 12175488. Its totient is φ = 10075000.

The previous prime is 11121667. The next prime is 11121683. The reversal of 11121671 is 17612111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11121671 - 2² = 11121667 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1796 + ... + 5046.

It is an arithmetic number, because the mean of its divisors is an integer number (1521936).

Almost surely, 2^11121671 is an apocalyptic number.

11121671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11121671 is a deficient number, since it is larger than the sum of its proper divisors (1053817).

11121671 is a wasteful number, since it uses less digits than its factorization.

11121671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573.

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

The square root of 11121671 is about 3334.9169404949. The cubic root of 11121671 is about 223.2149856868.

Adding to 11121671 its reverse (17612111), we get a palindrome (28733782).

The spelling of 11121671 in words is "eleven million, one hundred twenty-one thousand, six hundred seventy-one".