11123230031 has 4 divisors (see below), whose sum is σ = 11606848752. Its totient is φ = 10639611312.

The previous prime is 11123230009. The next prime is 11123230051. The reversal of 11123230031 is 13003232111.

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 11123230031 - 2⁶ = 11123229967 is a prime.

It is a super-2 number, since 2×11123230031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11123229991 and 11123230009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123230051) 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, 241809326 + ... + 241809371.

It is an arithmetic number, because the mean of its divisors is an integer number (2901712188).

Almost surely, 2^11123230031 is an apocalyptic number.

11123230031 is a deficient number, since it is larger than the sum of its proper divisors (483618721).

11123230031 is an equidigital number, since it uses as much as digits as its factorization.

11123230031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483618720.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 11123230031 its reverse (13003232111), we get a palindrome (24126462142).

The spelling of 11123230031 in words is "eleven billion, one hundred twenty-three million, two hundred thirty thousand, thirty-one".