12001335420 has 48 divisors (see below), whose sum is σ = 33673973760. Its totient is φ = 3193667136.

The previous prime is 12001335361. The next prime is 12001335457. The reversal of 12001335420 is 2453310021.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 180052 + ... + 237531.

It is an arithmetic number, because the mean of its divisors is an integer number (701541120).

Almost surely, 2^12001335420 is an apocalyptic number.

12001335420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001335420 is an abundant number, since it is smaller than the sum of its proper divisors (21672638340).

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

12001335420 is a wasteful number, since it uses less digits than its factorization.

12001335420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418074 (or 418072 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 12001335420 its reverse (2453310021), we get a palindrome (14454645441).

The spelling of 12001335420 in words is "twelve billion, one million, three hundred thirty-five thousand, four hundred twenty".