201221012120212 has 24 divisors (see below), whose sum is σ = 403009643496320. Its totient is φ = 86115943925280.

The previous prime is 201221012120203. The next prime is 201221012120221. The reversal of 201221012120212 is 212021210122102.

It is an interprime number because it is at equal distance from previous prime (201221012120203) and next prime (201221012120221).

It is a self number, because there is not a number n which added to its sum of digits gives 201221012120212.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 5068008864 + ... + 5068048567.

Almost surely, 2^{201221012120212} is an apocalyptic number.

It is an amenable number.

201221012120212 is an abundant number, since it is smaller than the sum of its proper divisors (201788631376108).

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

201221012120212 is a wasteful number, since it uses less digits than its factorization.

201221012120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10136058151 (or 10136058149 counting only the distinct ones).

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

Adding to 201221012120212 its reverse (212021210122102), we get a palindrome (413242222242314).

The spelling of 201221012120212 in words is "two hundred one trillion, two hundred twenty-one billion, twelve million, one hundred twenty thousand, two hundred twelve".