12003123031 has 4 divisors (see below), whose sum is σ = 12082614064. Its totient is φ = 11923632000.

The previous prime is 12003123019. The next prime is 12003123053. The reversal of 12003123031 is 13032130021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13032130021 = 31 ⋅420391291.

It is a cyclic number.

It is not a de Polignac number, because 12003123031 - 2⁹ = 12003122519 is a prime.

It is a super-2 number, since 2×12003123031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12003122996 and 12003123014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003123131) 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, 39745290 + ... + 39745591.

It is an arithmetic number, because the mean of its divisors is an integer number (3020653516).

Almost surely, 2^12003123031 is an apocalyptic number.

12003123031 is a deficient number, since it is larger than the sum of its proper divisors (79491033).

12003123031 is an equidigital number, since it uses as much as digits as its factorization.

12003123031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79491032.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 12003123031 its reverse (13032130021), we get a palindrome (25035253052).

The spelling of 12003123031 in words is "twelve billion, three million, one hundred twenty-three thousand, thirty-one".