11121213 has 32 divisors (see below), whose sum is σ = 17280000. Its totient is φ = 6310656.

The previous prime is 11121197. The next prime is 11121217. The reversal of 11121213 is 31212111.

It is not a de Polignac number, because 11121213 - 2⁴ = 11121197 is a prime.

It is a Curzon number.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 22038 + ... + 22536.

It is an arithmetic number, because the mean of its divisors is an integer number (540000).

Almost surely, 2^11121213 is an apocalyptic number.

It is an amenable number.

11121213 is a deficient number, since it is larger than the sum of its proper divisors (6158787).

11121213 is a wasteful number, since it uses less digits than its factorization.

11121213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561.

The product of its digits is 12, while the sum is 12.

The square root of 11121213 is about 3334.8482724106. The cubic root of 11121213 is about 223.2119215829.

Adding to 11121213 its reverse (31212111), we get a palindrome (42333324).

The spelling of 11121213 in words is "eleven million, one hundred twenty-one thousand, two hundred thirteen".