12011111123 has 8 divisors (see below), whose sum is σ = 13105185456. Its totient is φ = 10917396000.

The previous prime is 12011111113. The next prime is 12011111149. The reversal of 12011111123 is 32111111021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12011111123 - 2¹⁰ = 12011110099 is a prime.

It is a super-2 number, since 2×12011111123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12011111098 and 12011111107.

It is not an unprimeable number, because it can be changed into a prime (12011111113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17336 + ... + 155957.

It is an arithmetic number, because the mean of its divisors is an integer number (1638148182).

Almost surely, 2^12011111123 is an apocalyptic number.

12011111123 is a deficient number, since it is larger than the sum of its proper divisors (1094074333).

12011111123 is a wasteful number, since it uses less digits than its factorization.

12011111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179605.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 12011111123 its reverse (32111111021), we get a palindrome (44122222144).

The spelling of 12011111123 in words is "twelve billion, eleven million, one hundred eleven thousand, one hundred twenty-three".