201221221012 has 12 divisors (see below), whose sum is σ = 402442442080. Its totient is φ = 86237666136.

The previous prime is 201221221009. The next prime is 201221221027. The reversal of 201221221012 is 210122122102.

It is a happy number.

201221221012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

201221221012 is an admirable number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 3593236062 + ... + 3593236117.

Almost surely, 2^201221221012 is an apocalyptic number.

It is an amenable number.

201221221012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201221221012 is a wasteful number, since it uses less digits than its factorization.

201221221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7186472190 (or 7186472188 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201221221012 its reverse (210122122102), we get a palindrome (411343343114).

The spelling of 201221221012 in words is "two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, twelve".