12201121000221 has 64 divisors (see below), whose sum is σ = 17987229204480. Its totient is φ = 7324378629120.

The previous prime is 12201121000219. The next prime is 12201121000231. The reversal of 12201121000221 is 12200012110221.

It is not a de Polignac number, because 12201121000221 - 2¹ = 12201121000219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12201121000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201121000231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50657140 + ... + 50897426.

It is an arithmetic number, because the mean of its divisors is an integer number (281050456320).

Almost surely, 2^{12201121000221} is an apocalyptic number.

It is an amenable number.

12201121000221 is a deficient number, since it is larger than the sum of its proper divisors (5786108204259).

12201121000221 is a wasteful number, since it uses less digits than its factorization.

12201121000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240794.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12201121000221 its reverse (12200012110221), we get a palindrome (24401133110442).

Subtracting from 12201121000221 its reverse (12200012110221), we obtain a square (1108890000 = 33300²).

The spelling of 12201121000221 in words is "twelve trillion, two hundred one billion, one hundred twenty-one million, two hundred twenty-one", and thus it is an aban number.