12111201010221 has 32 divisors (see below), whose sum is σ = 17030366538240. Its totient is φ = 7646103791424.

The previous prime is 12111201010217. The next prime is 12111201010273. The reversal of 12111201010221 is 12201010211121.

It is a happy number.

12111201010221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12111201010221 - 2² = 12111201010217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12111201010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111201010121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3132351 + ... + 5833868.

It is an arithmetic number, because the mean of its divisors is an integer number (532198954320).

Almost surely, 2^{12111201010221} is an apocalyptic number.

It is an amenable number.

12111201010221 is a deficient number, since it is larger than the sum of its proper divisors (4919165528019).

12111201010221 is a wasteful number, since it uses less digits than its factorization.

12111201010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8966585.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12111201010221 its reverse (12201010211121), we get a palindrome (24312211221342).

The spelling of 12111201010221 in words is "twelve trillion, one hundred eleven billion, two hundred one million, ten thousand, two hundred twenty-one".