12121168618 has 8 divisors (see below), whose sum is σ = 19580349348. Its totient is φ = 5594385504.

The previous prime is 12121168603. The next prime is 12121168621. The reversal of 12121168618 is 81686112121.

It can be written as a sum of positive squares in 2 ways, for example, as 11605106529 + 516062089 = 107727^2 + 22717^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233099371 + ... + 233099422.

Almost surely, 2^12121168618 is an apocalyptic number.

12121168618 is a deficient number, since it is larger than the sum of its proper divisors (7459180730).

12121168618 is a wasteful number, since it uses less digits than its factorization.

12121168618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466198808.

The product of its digits is 9216, while the sum is 37.

The spelling of 12121168618 in words is "twelve billion, one hundred twenty-one million, one hundred sixty-eight thousand, six hundred eighteen".