12420402240 has 112 divisors (see below), whose sum is σ = 40396728960. Its totient is φ = 3231313920.

The previous prime is 12420402223. The next prime is 12420402259. The reversal of 12420402240 is 4220402421.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118420 + ... + 197139.

It is an arithmetic number, because the mean of its divisors is an integer number (360685080).

Almost surely, 2^12420402240 is an apocalyptic number.

12420402240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12420402240 is an abundant number, since it is smaller than the sum of its proper divisors (27976326720).

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

12420402240 is a wasteful number, since it uses less digits than its factorization.

12420402240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315620 (or 315610 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 12420402240 its reverse (4220402421), we get a palindrome (16640804661).

The spelling of 12420402240 in words is "twelve billion, four hundred twenty million, four hundred two thousand, two hundred forty".