12121022212 has 24 divisors (see below), whose sum is σ = 22943240600. Its totient is φ = 5569883136.

The previous prime is 12121022153. The next prime is 12121022213. The reversal of 12121022212 is 21222012121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 397763136 + 11723259076 = 19944^2 + 108274^2 .

It is not an unprimeable number, because it can be changed into a prime (12121022213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497037 + ... + 520852.

Almost surely, 2^12121022212 is an apocalyptic number.

It is an amenable number.

12121022212 is a deficient number, since it is larger than the sum of its proper divisors (10822218388).

12121022212 is a wasteful number, since it uses less digits than its factorization.

12121022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018135 (or 1018133 counting only the distinct ones).

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

Adding to 12121022212 its reverse (21222012121), we get a palindrome (33343034333).

The spelling of 12121022212 in words is "twelve billion, one hundred twenty-one million, twenty-two thousand, two hundred twelve".