201201210221 has 4 divisors (see below), whose sum is σ = 219492229344. Its totient is φ = 182910191100.

The previous prime is 201201210209. The next prime is 201201210227. The reversal of 201201210221 is 122012102102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201201210221 - 2⁶ = 201201210157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201201210196 and 201201210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201210227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9145509545 + ... + 9145509566.

It is an arithmetic number, because the mean of its divisors is an integer number (54873057336).

Almost surely, 2^201201210221 is an apocalyptic number.

It is an amenable number.

201201210221 is a deficient number, since it is larger than the sum of its proper divisors (18291019123).

201201210221 is a wasteful number, since it uses less digits than its factorization.

201201210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18291019122.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201201210221 its reverse (122012102102), we get a palindrome (323213312323).

The spelling of 201201210221 in words is "two hundred one billion, two hundred one million, two hundred ten thousand, two hundred twenty-one".