12121151646 has 8 divisors (see below), whose sum is σ = 24242303304. Its totient is φ = 4040383880.

The previous prime is 12121151591. The next prime is 12121151681. The reversal of 12121151646 is 64615112121.

12121151646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

12121151646 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 1010095965 + ... + 1010095976.

It is an arithmetic number, because the mean of its divisors is an integer number (3030287913).

Almost surely, 2^12121151646 is an apocalyptic number.

12121151646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12121151646 is a wasteful number, since it uses less digits than its factorization.

12121151646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020191946.

The product of its digits is 2880, while the sum is 30.

Adding to 12121151646 its reverse (64615112121), we get a palindrome (76736263767).

The spelling of 12121151646 in words is "twelve billion, one hundred twenty-one million, one hundred fifty-one thousand, six hundred forty-six".