11121211 has 8 divisors (see below), whose sum is σ = 11322000. Its totient is φ = 10922400.

The previous prime is 11121197. The next prime is 11121217. The reversal of 11121211 is 11212111.

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 11121211 - 2⁷ = 11121083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121217) 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 in 7 ways as a sum of consecutive naturals, for example, 14680 + ... + 15418.

It is an arithmetic number, because the mean of its divisors is an integer number (1415250).

Almost surely, 2^11121211 is an apocalyptic number.

11121211 is a deficient number, since it is larger than the sum of its proper divisors (200789).

11121211 is a wasteful number, since it uses less digits than its factorization.

11121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989.

The product of its digits is 4, while the sum is 10.

The square root of 11121211 is about 3334.8479725469. The cubic root of 11121211 is about 223.2119082023.

Adding to 11121211 its reverse (11212111), we get a palindrome (22333322).

The spelling of 11121211 in words is "eleven million, one hundred twenty-one thousand, two hundred eleven".