201211010211221 has 16 divisors (see below), whose sum is σ = 208633503257088. Its totient is φ = 193940535600000.

The previous prime is 201211010211163. The next prime is 201211010211251. The reversal of 201211010211221 is 122112010112102.

It is a cyclic number.

It is not a de Polignac number, because 201211010211221 - 2¹⁴ = 201211010194837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201211010211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211010211251) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 113941280 + ... + 115693721.

It is an arithmetic number, because the mean of its divisors is an integer number (13039593953568).

Almost surely, 2^{201211010211221} is an apocalyptic number.

It is an amenable number.

201211010211221 is a deficient number, since it is larger than the sum of its proper divisors (7422493045867).

201211010211221 is a wasteful number, since it uses less digits than its factorization.

201211010211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229635332.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201211010211221 its reverse (122112010112102), we get a palindrome (323323020323323).

The spelling of 201211010211221 in words is "two hundred one trillion, two hundred eleven billion, ten million, two hundred eleven thousand, two hundred twenty-one".