12042142243 has 4 divisors (see below), whose sum is σ = 12269352528. Its totient is φ = 11814931960.

The previous prime is 12042142201. The next prime is 12042142247. The reversal of 12042142243 is 34224124021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34224124021 = 21391 ⋅1599931.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12042142243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12042142247) 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, 113605063 + ... + 113605168.

It is an arithmetic number, because the mean of its divisors is an integer number (3067338132).

Almost surely, 2^12042142243 is an apocalyptic number.

12042142243 is a deficient number, since it is larger than the sum of its proper divisors (227210285).

12042142243 is an equidigital number, since it uses as much as digits as its factorization.

12042142243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227210284.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 12042142243 its reverse (34224124021), we get a palindrome (46266266264).

The spelling of 12042142243 in words is "twelve billion, forty-two million, one hundred forty-two thousand, two hundred forty-three".