1212210221212 has 6 divisors (see below), whose sum is σ = 2121367887128. Its totient is φ = 606105110604.

The previous prime is 1212210221179. The next prime is 1212210221231. The reversal of 1212210221212 is 2121220122121.

It is a self number, because there is not a number n which added to its sum of digits gives 1212210221212.

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, 151526277648 + ... + 151526277655.

Almost surely, 2^{1212210221212} is an apocalyptic number.

It is an amenable number.

1212210221212 is a deficient number, since it is larger than the sum of its proper divisors (909157665916).

1212210221212 is a wasteful number, since it uses less digits than its factorization.

1212210221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303052555307 (or 303052555305 counting only the distinct ones).

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

Adding to 1212210221212 its reverse (2121220122121), we get a palindrome (3333430343333).

Subtracting 1212210221212 from its reverse (2121220122121), we obtain a palindrome (909009900909).

The spelling of 1212210221212 in words is "one trillion, two hundred twelve billion, two hundred ten million, two hundred twenty-one thousand, two hundred twelve".