201221321001212 has 24 divisors (see below), whose sum is σ = 352415486610432. Its totient is φ = 100531199030000.

The previous prime is 201221321001137. The next prime is 201221321001221. The reversal of 201221321001212 is 212100123122102.

201221321001212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45154337 + ... + 49410087.

It is an arithmetic number, because the mean of its divisors is an integer number (14683978608768).

Almost surely, 2^{201221321001212} is an apocalyptic number.

It is an amenable number.

201221321001212 is a deficient number, since it is larger than the sum of its proper divisors (151194165609220).

201221321001212 is a wasteful number, since it uses less digits than its factorization.

201221321001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4265089 (or 4265087 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 201221321001212 its reverse (212100123122102), we get a palindrome (413321444123314).

The spelling of 201221321001212 in words is "two hundred one trillion, two hundred twenty-one billion, three hundred twenty-one million, one thousand, two hundred twelve".