12011010123 has 16 divisors (see below), whose sum is σ = 18308459520. Its totient is φ = 6861196416.

The previous prime is 12011010107. The next prime is 12011010133. The reversal of 12011010123 is 32101011021.

It is not a de Polignac number, because 12011010123 - 2⁴ = 12011010107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12011010099 and 12011010108.

It is not an unprimeable number, because it can be changed into a prime (12011010103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26190 + ... + 157187.

It is an arithmetic number, because the mean of its divisors is an integer number (1144278720).

Almost surely, 2^12011010123 is an apocalyptic number.

12011010123 is a deficient number, since it is larger than the sum of its proper divisors (6297449397).

12011010123 is a wasteful number, since it uses less digits than its factorization.

12011010123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186506.

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

Adding to 12011010123 its reverse (32101011021), we get a palindrome (44112021144).

The spelling of 12011010123 in words is "twelve billion, eleven million, ten thousand, one hundred twenty-three".