201212120121221 has 8 divisors (see below), whose sum is σ = 221677439270688. Its totient is φ = 181109019010000.

The previous prime is 201212120121211. The next prime is 201212120121241. The reversal of 201212120121221 is 122121021212102.

201212120121221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201212120121221 - 2³⁴ = 201194940252037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201212120121193 and 201212120121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212120121211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90554508395 + ... + 90554510616.

It is an arithmetic number, because the mean of its divisors is an integer number (27709679908836).

Almost surely, 2^{201212120121221} is an apocalyptic number.

It is an amenable number.

201212120121221 is a deficient number, since it is larger than the sum of its proper divisors (20465319149467).

201212120121221 is a wasteful number, since it uses less digits than its factorization.

201212120121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181109019123.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 201212120121221 its reverse (122121021212102), we get a palindrome (323333141333323).

The spelling of 201212120121221 in words is "two hundred one trillion, two hundred twelve billion, one hundred twenty million, one hundred twenty-one thousand, two hundred twenty-one".