12042122243 has 4 divisors (see below), whose sum is σ = 12067908840. Its totient is φ = 12016335648.

The previous prime is 12042122173. The next prime is 12042122251. The reversal of 12042122243 is 34222124021.

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

It is a cyclic number.

It is not a de Polignac number, because 12042122243 - 2¹⁰ = 12042121219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12042128243) 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, 12892598 + ... + 12893531.

It is an arithmetic number, because the mean of its divisors is an integer number (3016977210).

Almost surely, 2^12042122243 is an apocalyptic number.

12042122243 is a deficient number, since it is larger than the sum of its proper divisors (25786597).

12042122243 is an equidigital number, since it uses as much as digits as its factorization.

12042122243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25786596.

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

Adding to 12042122243 its reverse (34222124021), we get a palindrome (46264246264).

The spelling of 12042122243 in words is "twelve billion, forty-two million, one hundred twenty-two thousand, two hundred forty-three".