12210212122 has 4 divisors (see below), whose sum is σ = 18315318186. Its totient is φ = 6105106060.

The previous prime is 12210212111. The next prime is 12210212123. The reversal of 12210212122 is 22121201221.

It is a happy number.

12210212122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22121201221 = 7 ⋅3160171603.

It can be written as a sum of positive squares in only one way, i.e., 11916123921 + 294088201 = 109161^2 + 17149^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12210212096 and 12210212105.

It is not an unprimeable number, because it can be changed into a prime (12210212123) by changing a digit.

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 as a sum of consecutive naturals, namely, 3052553029 + ... + 3052553032.

Almost surely, 2^12210212122 is an apocalyptic number.

12210212122 is a deficient number, since it is larger than the sum of its proper divisors (6105106064).

12210212122 is an equidigital number, since it uses as much as digits as its factorization.

12210212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105106063.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12210212122 its reverse (22121201221), we get a palindrome (34331413343).

The spelling of 12210212122 in words is "twelve billion, two hundred ten million, two hundred twelve thousand, one hundred twenty-two".