111123000231 has 4 divisors (see below), whose sum is σ = 148164000312. Its totient is φ = 74082000152.

The previous prime is 111123000143. The next prime is 111123000257. The reversal of 111123000231 is 132000321111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132000321111 = 3 ⋅44000107037.

It is a cyclic number.

It is not a de Polignac number, because 111123000231 - 2¹¹ = 111122998183 is a prime.

It is a super-2 number, since 2×111123000231² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111123000231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111123000431) 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, 18520500036 + ... + 18520500041.

It is an arithmetic number, because the mean of its divisors is an integer number (37041000078).

Almost surely, 2^111123000231 is an apocalyptic number.

111123000231 is a deficient number, since it is larger than the sum of its proper divisors (37041000081).

111123000231 is an equidigital number, since it uses as much as digits as its factorization.

111123000231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37041000080.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 111123000231 its reverse (132000321111), we get a palindrome (243123321342).

The spelling of 111123000231 in words is "one hundred eleven billion, one hundred twenty-three million, two hundred thirty-one", and thus it is an aban number.