12105423242 has 16 divisors (see below), whose sum is σ = 19810598112. Its totient is φ = 5501986320.

The previous prime is 12105423193. The next prime is 12105423247. The reversal of 12105423242 is 24232450121.

It is not an unprimeable number, because it can be changed into a prime (12105423247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407093 + ... + 435815.

It is an arithmetic number, because the mean of its divisors is an integer number (1238162382).

Almost surely, 2^12105423242 is an apocalyptic number.

12105423242 is a deficient number, since it is larger than the sum of its proper divisors (7705174870).

12105423242 is a wasteful number, since it uses less digits than its factorization.

12105423242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47893.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 12105423242 its reverse (24232450121), we get a palindrome (36337873363).

The spelling of 12105423242 in words is "twelve billion, one hundred five million, four hundred twenty-three thousand, two hundred forty-two".