11123000231 has 4 divisors (see below), whose sum is σ = 12712000272. Its totient is φ = 9534000192.

The previous prime is 11123000183. The next prime is 11123000279. The reversal of 11123000231 is 13200032111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13200032111 = 7 ⋅1885718873.

It is an interprime number because it is at equal distance from previous prime (11123000183) and next prime (11123000279).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11123000231 is a prime.

It is a super-2 number, since 2×11123000231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123000281) 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, 794500010 + ... + 794500023.

It is an arithmetic number, because the mean of its divisors is an integer number (3178000068).

Almost surely, 2^11123000231 is an apocalyptic number.

11123000231 is a deficient number, since it is larger than the sum of its proper divisors (1589000041).

11123000231 is an equidigital number, since it uses as much as digits as its factorization.

11123000231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589000040.

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

Adding to 11123000231 its reverse (13200032111), we get a palindrome (24323032342).

The spelling of 11123000231 in words is "eleven billion, one hundred twenty-three million, two hundred thirty-one", and thus it is an aban number.