1212222200212 has 6 divisors (see below), whose sum is σ = 2121388850378. Its totient is φ = 606111100104.

The previous prime is 1212222200209. The next prime is 1212222200213. The reversal of 1212222200212 is 2120022222121.

It can be written as a sum of positive squares in only one way, i.e., 1133892744336 + 78329455876 = 1064844^2 + 279874^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212222200212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212222200213) by changing a digit.

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 as a sum of consecutive naturals, namely, 151527775023 + ... + 151527775030.

Almost surely, 2^{1212222200212} is an apocalyptic number.

It is an amenable number.

1212222200212 is a deficient number, since it is larger than the sum of its proper divisors (909166650166).

1212222200212 is a wasteful number, since it uses less digits than its factorization.

1212222200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303055550057 (or 303055550055 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1212222200212 its reverse (2120022222121), we get a palindrome (3332244422333).

The spelling of 1212222200212 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, two hundred thousand, two hundred twelve".