11123031 has 4 divisors (see below), whose sum is σ = 14830712. Its totient is φ = 7415352.

The previous prime is 11123023. The next prime is 11123033. The reversal of 11123031 is 13032111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13032111 = 3 ⋅4344037.

It is not a de Polignac number, because 11123031 - 2³ = 11123023 is a prime.

It is a super-2 number, since 2×11123031² = 247443637253922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11122998 and 11123016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123033) 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, 1853836 + ... + 1853841.

It is an arithmetic number, because the mean of its divisors is an integer number (3707678).

Almost surely, 2^11123031 is an apocalyptic number.

11123031 is a deficient number, since it is larger than the sum of its proper divisors (3707681).

11123031 is an equidigital number, since it uses as much as digits as its factorization.

11123031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707680.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 11123031 is about 3335.1208373911. The cubic root of 11123031 is about 223.2240838402.

Adding to 11123031 its reverse (13032111), we get a palindrome (24155142).

The spelling of 11123031 in words is "eleven million, one hundred twenty-three thousand, thirty-one".