12015402042 has 32 divisors (see below), whose sum is σ = 27475881984. Its totient is φ = 3431458800.

The previous prime is 12015402041. The next prime is 12015402059. The reversal of 12015402042 is 24020451021.

12015402042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12015402041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35167 + ... + 158957.

It is an arithmetic number, because the mean of its divisors is an integer number (858621312).

Almost surely, 2^12015402042 is an apocalyptic number.

12015402042 is an abundant number, since it is smaller than the sum of its proper divisors (15460479942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12015402042 is a wasteful number, since it uses less digits than its factorization.

12015402042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126114.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 12015402042 its reverse (24020451021), we get a palindrome (36035853063).

The spelling of 12015402042 in words is "twelve billion, fifteen million, four hundred two thousand, forty-two".