1212210212212 has 6 divisors (see below), whose sum is σ = 2121367871378. Its totient is φ = 606105106104.

The previous prime is 1212210212189. The next prime is 1212210212231. The reversal of 1212210212212 is 2122120122121.

It can be written as a sum of positive squares in only one way, i.e., 1181077727076 + 31132485136 = 1086774^2 + 176444^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212210212212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151526276523 + ... + 151526276530.

Almost surely, 2^{1212210212212} is an apocalyptic number.

It is an amenable number.

1212210212212 is a deficient number, since it is larger than the sum of its proper divisors (909157659166).

1212210212212 is a wasteful number, since it uses less digits than its factorization.

1212210212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303052553057 (or 303052553055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212210212212 its reverse (2122120122121), we get a palindrome (3334330334333).

Subtracting 1212210212212 from its reverse (2122120122121), we obtain a palindrome (909909909909).

The spelling of 1212210212212 in words is "one trillion, two hundred twelve billion, two hundred ten million, two hundred twelve thousand, two hundred twelve".