201212120000221 has 16 divisors (see below), whose sum is σ = 231200761858560. Its totient is φ = 173184898463280.

The previous prime is 201212120000113. The next prime is 201212120000233. The reversal of 201212120000221 is 122000021212102.

It is a happy number.

It is not a de Polignac number, because 201212120000221 - 2¹⁷ = 201212119869149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201212120000195 and 201212120000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212120000261) 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, 299209071 + ... + 299880796.

It is an arithmetic number, because the mean of its divisors is an integer number (14450047616160).

Almost surely, 2^{201212120000221} is an apocalyptic number.

It is an amenable number.

201212120000221 is a deficient number, since it is larger than the sum of its proper divisors (29988641858339).

201212120000221 is a wasteful number, since it uses less digits than its factorization.

201212120000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599091504.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201212120000221 its reverse (122000021212102), we get a palindrome (323212141212323).

The spelling of 201212120000221 in words is "two hundred one trillion, two hundred twelve billion, one hundred twenty million, two hundred twenty-one", and thus it is an aban number.