1212201221012 has 12 divisors (see below), whose sum is σ = 2121388868256. Its totient is φ = 606090115800.

The previous prime is 1212201220949. The next prime is 1212201221039. The reversal of 1212201221012 is 2101221022121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2360864 + ... + 2828087.

It is an arithmetic number, because the mean of its divisors is an integer number (176782405688).

Almost surely, 2^{1212201221012} is an apocalyptic number.

It is an amenable number.

1212201221012 is a deficient number, since it is larger than the sum of its proper divisors (909187647244).

1212201221012 is a wasteful number, since it uses less digits than its factorization.

1212201221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5247358 (or 5247356 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212201221012 its reverse (2101221022121), we get a palindrome (3313422243133).

The spelling of 1212201221012 in words is "one trillion, two hundred twelve billion, two hundred one million, two hundred twenty-one thousand, twelve".