11213111 has 24 divisors (see below), whose sum is σ = 14555520. Its totient is φ = 8551872.

The previous prime is 11213093. The next prime is 11213113. The reversal of 11213111 is 11131211.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-11213111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11213092 and 11213101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213113) 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 23 ways as a sum of consecutive naturals, for example, 18170 + ... + 18776.

It is an arithmetic number, because the mean of its divisors is an integer number (606480).

Almost surely, 2^11213111 is an apocalyptic number.

11213111 is a deficient number, since it is larger than the sum of its proper divisors (3342409).

11213111 is a wasteful number, since it uses less digits than its factorization.

11213111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 656 counting only the distinct ones).

The product of its digits is 6, while the sum is 11.

The square root of 11213111 is about 3348.5983634948. The cubic root of 11213111 is about 223.8250587211.

Adding to 11213111 its reverse (11131211), we get a palindrome (22344322).

The spelling of 11213111 in words is "eleven million, two hundred thirteen thousand, one hundred eleven".