12139841820 has 24 divisors (see below), whose sum is σ = 33991557264. Its totient is φ = 3237291136.

The previous prime is 12139841809. The next prime is 12139841839. The reversal of 12139841820 is 2814893121.

12139841820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 101165289 + ... + 101165408.

It is an arithmetic number, because the mean of its divisors is an integer number (1416314886).

Almost surely, 2^12139841820 is an apocalyptic number.

12139841820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12139841820 is an abundant number, since it is smaller than the sum of its proper divisors (21851715444).

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

12139841820 is a wasteful number, since it uses less digits than its factorization.

12139841820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202330709 (or 202330707 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The spelling of 12139841820 in words is "twelve billion, one hundred thirty-nine million, eight hundred forty-one thousand, eight hundred twenty".