12420331242 has 16 divisors (see below), whose sum is σ = 27098904672. Its totient is φ = 3763736720.

The previous prime is 12420331241. The next prime is 12420331271. The reversal of 12420331242 is 24213302421.

It is a happy number.

It is a super-2 number, since 2×12420331242² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12420331241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94093353 + ... + 94093484.

It is an arithmetic number, because the mean of its divisors is an integer number (1693681542).

Almost surely, 2^12420331242 is an apocalyptic number.

12420331242 is an abundant number, since it is smaller than the sum of its proper divisors (14678573430).

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

12420331242 is a wasteful number, since it uses less digits than its factorization.

12420331242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188186853.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 12420331242 its reverse (24213302421), we get a palindrome (36633633663).

The spelling of 12420331242 in words is "twelve billion, four hundred twenty million, three hundred thirty-one thousand, two hundred forty-two".