12121121222 has 8 divisors (see below), whose sum is σ = 20779064976. Its totient is φ = 5194766232.

The previous prime is 12121121209. The next prime is 12121121273. The reversal of 12121121222 is 22212112121.

12121121222 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.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 12121121222.

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, 432897173 + ... + 432897200.

It is an arithmetic number, because the mean of its divisors is an integer number (2597383122).

Almost surely, 2^12121121222 is an apocalyptic number.

12121121222 is a deficient number, since it is larger than the sum of its proper divisors (8657943754).

12121121222 is an equidigital number, since it uses as much as digits as its factorization.

12121121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865794382.

The product of its digits is 64, while the sum is 17.

Adding to 12121121222 its reverse (22212112121), we get a palindrome (34333233343).

The spelling of 12121121222 in words is "twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-two".