201010010001221 has 16 divisors (see below), whose sum is σ = 210496035657600. Its totient is φ = 191586565767168.

The previous prime is 201010010001209. The next prime is 201010010001223. The reversal of 201010010001221 is 122100010010102.

201010010001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201010010001221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201010010001223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19230365 + ... + 27781773.

It is an arithmetic number, because the mean of its divisors is an integer number (13156002228600).

Almost surely, 2^{201010010001221} is an apocalyptic number.

It is an amenable number.

201010010001221 is a deficient number, since it is larger than the sum of its proper divisors (9486025656379).

201010010001221 is a wasteful number, since it uses less digits than its factorization.

201010010001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8555068.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201010010001221 its reverse (122100010010102), we get a palindrome (323110020011323).

The spelling of 201010010001221 in words is "two hundred one trillion, ten billion, ten million, one thousand, two hundred twenty-one".