1021221011212 has 12 divisors (see below), whose sum is σ = 1848762175680. Its totient is φ = 493003246736.

The previous prime is 1021221011201. The next prime is 1021221011243. The reversal of 1021221011212 is 2121101221201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4401814588 + ... + 4401814819.

It is an arithmetic number, because the mean of its divisors is an integer number (154063514640).

Almost surely, 2^{1021221011212} is an apocalyptic number.

It is an amenable number.

1021221011212 is a deficient number, since it is larger than the sum of its proper divisors (827541164468).

1021221011212 is a wasteful number, since it uses less digits than its factorization.

1021221011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8803629440 (or 8803629438 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1021221011212 its reverse (2121101221201), we get a palindrome (3142322232413).

The spelling of 1021221011212 in words is "one trillion, twenty-one billion, two hundred twenty-one million, eleven thousand, two hundred twelve".