12121201118 has 8 divisors (see below), whose sum is σ = 19580401848. Its totient is φ = 5594400504.

The previous prime is 12121201109. The next prime is 12121201129. The reversal of 12121201118 is 81110212121.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12121201118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233099996 + ... + 233100047.

It is an arithmetic number, because the mean of its divisors is an integer number (2447550231).

Almost surely, 2^12121201118 is an apocalyptic number.

12121201118 is a deficient number, since it is larger than the sum of its proper divisors (7459200730).

12121201118 is a wasteful number, since it uses less digits than its factorization.

12121201118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466200058.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 12121201118 its reverse (81110212121), we get a palindrome (93231413239).

The spelling of 12121201118 in words is "twelve billion, one hundred twenty-one million, two hundred one thousand, one hundred eighteen".