11123213 has 4 divisors (see below), whose sum is σ = 11158620. Its totient is φ = 11087808.

The previous prime is 11123201. The next prime is 11123221. The reversal of 11123213 is 31232111.

11123213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4502884 + 6620329 = 2122^2 + 2573^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123213 - 2¹² = 11119117 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 (11123243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17228 + ... + 17861.

It is an arithmetic number, because the mean of its divisors is an integer number (2789655).

Almost surely, 2^11123213 is an apocalyptic number.

It is an amenable number.

11123213 is a deficient number, since it is larger than the sum of its proper divisors (35407).

11123213 is an equidigital number, since it uses as much as digits as its factorization.

11123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35406.

The product of its digits is 36, while the sum is 14.

The square root of 11123213 is about 3335.1481226476. The cubic root of 11123213 is about 223.2253013310.

Adding to 11123213 its reverse (31232111), we get a palindrome (42355324).

The spelling of 11123213 in words is "eleven million, one hundred twenty-three thousand, two hundred thirteen".