12031223123 has 8 divisors (see below), whose sum is σ = 12101400000. Its totient is φ = 11961079528.

The previous prime is 12031223107. The next prime is 12031223143. The reversal of 12031223123 is 32132213021.

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 12031223123 - 2⁴ = 12031223107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12031223095 and 12031223104.

It is not an unprimeable number, because it can be changed into a prime (12031223143) 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 7 ways as a sum of consecutive naturals, for example, 1337840 + ... + 1346802.

It is an arithmetic number, because the mean of its divisors is an integer number (1512675000).

Almost surely, 2^12031223123 is an apocalyptic number.

12031223123 is a deficient number, since it is larger than the sum of its proper divisors (70176877).

12031223123 is an equidigital number, since it uses as much as digits as its factorization.

12031223123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16641.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12031223123 its reverse (32132213021), we get a palindrome (44163436144).

The spelling of 12031223123 in words is "twelve billion, thirty-one million, two hundred twenty-three thousand, one hundred twenty-three".