12001247420 has 48 divisors (see below), whose sum is σ = 25320859200. Its totient is φ = 4778027520.

The previous prime is 12001247417. The next prime is 12001247471. The reversal of 12001247420 is 2474210021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7021526 + ... + 7023234.

It is an arithmetic number, because the mean of its divisors is an integer number (527517900).

Almost surely, 2^12001247420 is an apocalyptic number.

12001247420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001247420 is an abundant number, since it is smaller than the sum of its proper divisors (13319611780).

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

12001247420 is a wasteful number, since it uses less digits than its factorization.

12001247420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158 (or 3156 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

Adding to 12001247420 its reverse (2474210021), we get a palindrome (14475457441).

The spelling of 12001247420 in words is "twelve billion, one million, two hundred forty-seven thousand, four hundred twenty".