201212002211221 has 16 divisors (see below), whose sum is σ = 210353094576000. Its totient is φ = 192103668364608.

The previous prime is 201212002211197. The next prime is 201212002211243. The reversal of 201212002211221 is 122112200212102.

It is a cyclic number.

It is not a de Polignac number, because 201212002211221 - 2¹⁷ = 201212002080149 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 (201212002211261) 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, 308021455 + ... + 308674003.

It is an arithmetic number, because the mean of its divisors is an integer number (13147068411000).

Almost surely, 2^{201212002211221} is an apocalyptic number.

It is an amenable number.

201212002211221 is a deficient number, since it is larger than the sum of its proper divisors (9141092364779).

201212002211221 is a wasteful number, since it uses less digits than its factorization.

201212002211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677628.

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

Adding to 201212002211221 its reverse (122112200212102), we get a palindrome (323324202423323).

The spelling of 201212002211221 in words is "two hundred one trillion, two hundred twelve billion, two million, two hundred eleven thousand, two hundred twenty-one".