12240342242123 has 4 divisors (see below), whose sum is σ = 12354737964120. Its totient is φ = 12125946520128.

The previous prime is 12240342242057. The next prime is 12240342242137. The reversal of 12240342242123 is 32124224304221.

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 12240342242123 - 2¹² = 12240342238027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12240342242123.

It is not an unprimeable number, because it can be changed into a prime (12240342247123) 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, 57197860838 + ... + 57197861051.

It is an arithmetic number, because the mean of its divisors is an integer number (3088684491030).

Almost surely, 2^{12240342242123} is an apocalyptic number.

12240342242123 is a deficient number, since it is larger than the sum of its proper divisors (114395721997).

12240342242123 is a wasteful number, since it uses less digits than its factorization.

12240342242123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114395721996.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 12240342242123 its reverse (32124224304221), we get a palindrome (44364566546344).

The spelling of 12240342242123 in words is "twelve trillion, two hundred forty billion, three hundred forty-two million, two hundred forty-two thousand, one hundred twenty-three".