1220221211212 has 12 divisors (see below), whose sum is σ = 2135430860080. Its totient is φ = 610098108336.

The previous prime is 1220221211203. The next prime is 1220221211327. The reversal of 1220221211212 is 2121121220221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220221211212.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 2902887 + ... + 3296542.

Almost surely, 2^{1220221211212} is an apocalyptic number.

It is an amenable number.

1220221211212 is a deficient number, since it is larger than the sum of its proper divisors (915209648868).

1220221211212 is a wasteful number, since it uses less digits than its factorization.

1220221211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6248640 (or 6248638 counting only the distinct ones).

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

Adding to 1220221211212 its reverse (2121121220221), we get a palindrome (3341342431433).

Subtracting 1220221211212 from its reverse (2121121220221), we obtain a palindrome (900900009009).

The spelling of 1220221211212 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twelve".