12159221671 has 8 divisors (see below), whose sum is σ = 12459574160. Its totient is φ = 11859668352.

The previous prime is 12159221651. The next prime is 12159221689. The reversal of 12159221671 is 17612295121.

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

It is a cyclic number.

It is not a de Polignac number, because 12159221671 - 2⁹ = 12159221159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12159221671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12159221651) 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, 168930 + ... + 229903.

It is an arithmetic number, because the mean of its divisors is an integer number (1557446770).

Almost surely, 2^12159221671 is an apocalyptic number.

12159221671 is a deficient number, since it is larger than the sum of its proper divisors (300352489).

12159221671 is an equidigital number, since it uses as much as digits as its factorization.

12159221671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399585.

The product of its digits is 15120, while the sum is 37.

The spelling of 12159221671 in words is "twelve billion, one hundred fifty-nine million, two hundred twenty-one thousand, six hundred seventy-one".