12011432123 has 4 divisors (see below), whose sum is σ = 12012257808. Its totient is φ = 12010606440.

The previous prime is 12011432113. The next prime is 12011432131. The reversal of 12011432123 is 32123411021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12011432123 - 2¹⁰ = 12011431099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011432095 and 12011432104.

It is not an unprimeable number, because it can be changed into a prime (12011432113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390623 + ... + 420248.

It is an arithmetic number, because the mean of its divisors is an integer number (3003064452).

Almost surely, 2^12011432123 is an apocalyptic number.

12011432123 is a deficient number, since it is larger than the sum of its proper divisors (825685).

12011432123 is an equidigital number, since it uses as much as digits as its factorization.

12011432123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825684.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12011432123 its reverse (32123411021), we get a palindrome (44134843144).

The spelling of 12011432123 in words is "twelve billion, eleven million, four hundred thirty-two thousand, one hundred twenty-three".