11123131 has 4 divisors (see below), whose sum is σ = 11248200. Its totient is φ = 10998064.

The previous prime is 11123129. The next prime is 11123137. The reversal of 11123131 is 13132111.

11123131 is digitally balanced in base 3, 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 is a cyclic number.

It is not a de Polignac number, because 11123131 - 2¹ = 11123129 is a prime.

It is a super-2 number, since 2×11123131² = 247448086486322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11123137) 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, 62401 + ... + 62578.

It is an arithmetic number, because the mean of its divisors is an integer number (2812050).

Almost surely, 2^11123131 is an apocalyptic number.

11123131 is a deficient number, since it is larger than the sum of its proper divisors (125069).

11123131 is an equidigital number, since it uses as much as digits as its factorization.

11123131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125068.

The product of its digits is 18, while the sum is 13.

The square root of 11123131 is about 3335.1358293179. The cubic root of 11123131 is about 223.2247527928.

Adding to 11123131 its reverse (13132111), we get a palindrome (24255242).

The spelling of 11123131 in words is "eleven million, one hundred twenty-three thousand, one hundred thirty-one".