12199856850 has 96 divisors (see below), whose sum is σ = 33863279040. Its totient is φ = 3229499520.

The previous prime is 12199856831. The next prime is 12199856891. The reversal of 12199856850 is 5865899121.

12199856850 is a `hidden beast` number, since 1 + 21 + 9 + 9 + 8 + 568 + 50 = 666.

12199856850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 47 ways as a sum of consecutive naturals, for example, 151969 + ... + 217931.

It is an arithmetic number, because the mean of its divisors is an integer number (352742490).

Almost surely, 2^12199856850 is an apocalyptic number.

12199856850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12199856850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16931639520).

12199856850 is an abundant number, since it is smaller than the sum of its proper divisors (21663422190).

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

12199856850 is a wasteful number, since it uses less digits than its factorization.

12199856850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66121 (or 66110 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 54.

The spelling of 12199856850 in words is "twelve billion, one hundred ninety-nine million, eight hundred fifty-six thousand, eight hundred fifty".