11111030123 has 4 divisors (see below), whose sum is σ = 11111909040. Its totient is φ = 11110151208.

The previous prime is 11111030089. The next prime is 11111030143. The reversal of 11111030123 is 32103011111.

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: 32103011111 = 41 ⋅783000271.

It is a cyclic number.

It is not a de Polignac number, because 11111030123 - 2¹² = 11111026027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111030098 and 11111030107.

It is not an unprimeable number, because it can be changed into a prime (11111030143) 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, 420215 + ... + 445872.

It is an arithmetic number, because the mean of its divisors is an integer number (2777977260).

Almost surely, 2^11111030123 is an apocalyptic number.

11111030123 is a deficient number, since it is larger than the sum of its proper divisors (878917).

11111030123 is an equidigital number, since it uses as much as digits as its factorization.

11111030123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878916.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 11111030123 its reverse (32103011111), we get a palindrome (43214041234).

The spelling of 11111030123 in words is "eleven billion, one hundred eleven million, thirty thousand, one hundred twenty-three".