12159221849 has 8 divisors (see below), whose sum is σ = 12225850728. Its totient is φ = 12092774400.

The previous prime is 12159221821. The next prime is 12159221857. The reversal of 12159221849 is 94812295121.

It can be written as a sum of positive squares in 4 ways, for example, as 7794241225 + 4364980624 = 88285^2 + 66068^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12159221849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12159221149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90149 + ... + 180125.

It is an arithmetic number, because the mean of its divisors is an integer number (1528231341).

Almost surely, 2^12159221849 is an apocalyptic number.

It is an amenable number.

12159221849 is a deficient number, since it is larger than the sum of its proper divisors (66628879).

12159221849 is an equidigital number, since it uses as much as digits as its factorization.

12159221849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90715.

The product of its digits is 103680, while the sum is 44.

The spelling of 12159221849 in words is "twelve billion, one hundred fifty-nine million, two hundred twenty-one thousand, eight hundred forty-nine".