12110101021221 has 64 divisors (see below), whose sum is σ = 19465032499200. Its totient is φ = 6542250849216.

The previous prime is 12110101021157. The next prime is 12110101021273. The reversal of 12110101021221 is 12212010101121.

It is a happy number.

It is not a de Polignac number, because 12110101021221 - 2⁶ = 12110101021157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12110101021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12110101021021) 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, 532558270 + ... + 532581008.

It is an arithmetic number, because the mean of its divisors is an integer number (304141132800).

Almost surely, 2^{12110101021221} is an apocalyptic number.

It is an amenable number.

12110101021221 is a deficient number, since it is larger than the sum of its proper divisors (7354931477979).

12110101021221 is a wasteful number, since it uses less digits than its factorization.

12110101021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25478.

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

Adding to 12110101021221 its reverse (12212010101121), we get a palindrome (24322111122342).

The spelling of 12110101021221 in words is "twelve trillion, one hundred ten billion, one hundred one million, twenty-one thousand, two hundred twenty-one".