12042442031 has 4 divisors (see below), whose sum is σ = 12750820992. Its totient is φ = 11334063072.

The previous prime is 12042442019. The next prime is 12042442043. The reversal of 12042442031 is 13024424021.

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

It is an interprime number because it is at equal distance from previous prime (12042442019) and next prime (12042442043).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12042442031 is a prime.

It is a super-2 number, since 2×12042442031² (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 = 12042441988 and 12042442006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12042442081) 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, 354189455 + ... + 354189488.

It is an arithmetic number, because the mean of its divisors is an integer number (3187705248).

Almost surely, 2^12042442031 is an apocalyptic number.

12042442031 is a deficient number, since it is larger than the sum of its proper divisors (708378961).

12042442031 is an equidigital number, since it uses as much as digits as its factorization.

12042442031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708378960.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12042442031 its reverse (13024424021), we get a palindrome (25066866052).

The spelling of 12042442031 in words is "twelve billion, forty-two million, four hundred forty-two thousand, thirty-one".