12120012031 has 4 divisors (see below), whose sum is σ = 12120948864. Its totient is φ = 12119075200.

The previous prime is 12120011993. The next prime is 12120012043. The reversal of 12120012031 is 13021002121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13021002121 = 23 ⋅566130527.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120012031 is a prime.

It is a super-2 number, since 2×12120012031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120012071) 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, 448735 + ... + 474976.

It is an arithmetic number, because the mean of its divisors is an integer number (3030237216).

Almost surely, 2^12120012031 is an apocalyptic number.

12120012031 is a deficient number, since it is larger than the sum of its proper divisors (936833).

12120012031 is an equidigital number, since it uses as much as digits as its factorization.

12120012031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936832.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12120012031 its reverse (13021002121), we get a palindrome (25141014152).

The spelling of 12120012031 in words is "twelve billion, one hundred twenty million, twelve thousand, thirty-one".