1021221200012 has 24 divisors (see below), whose sum is σ = 1938455307600. Its totient is φ = 467941974336.

The previous prime is 1021221200003. The next prime is 1021221200039. The reversal of 1021221200012 is 2100021221201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021221200012.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 70636187 + ... + 70650642.

It is an arithmetic number, because the mean of its divisors is an integer number (80768971150).

Almost surely, 2^{1021221200012} is an apocalyptic number.

It is an amenable number.

1021221200012 is a deficient number, since it is larger than the sum of its proper divisors (917234107588).

1021221200012 is a wasteful number, since it uses less digits than its factorization.

1021221200012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141286985 (or 141286983 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1021221200012 its reverse (2100021221201), we get a palindrome (3121242421213).

The spelling of 1021221200012 in words is "one trillion, twenty-one billion, two hundred twenty-one million, two hundred thousand, twelve".