12195121 has 8 divisors (see below), whose sum is σ = 12651264. Its totient is φ = 11742960.

The previous prime is 12195077. The next prime is 12195149. The reversal of 12195121 is 12159121.

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-12195121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12195092 and 12195101.

It is not an unprimeable number, because it can be changed into a prime (12192121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6171 + ... + 7903.

It is an arithmetic number, because the mean of its divisors is an integer number (1581408).

Almost surely, 2^12195121 is an apocalyptic number.

It is an amenable number.

12195121 is a deficient number, since it is larger than the sum of its proper divisors (456143).

12195121 is a wasteful number, since it uses less digits than its factorization.

12195121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991.

The product of its digits is 180, while the sum is 22.

The square root of 12195121 is about 3492.1513426540. The cubic root of 12195121 is about 230.1770596274.

The spelling of 12195121 in words is "twelve million, one hundred ninety-five thousand, one hundred twenty-one".