12102120111221 has 8 divisors (see below), whose sum is σ = 14020460090304. Its totient is φ = 10231146551520.

The previous prime is 12102120111203. The next prime is 12102120111281. The reversal of 12102120111221 is 12211102120121.

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 12102120111221 - 2¹⁴ = 12102120094837 is a prime.

It is a super-2 number, since 2×12102120111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12102120111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102120111281) 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, 11841604295 + ... + 11841605316.

It is an arithmetic number, because the mean of its divisors is an integer number (1752557511288).

Almost surely, 2^{12102120111221} is an apocalyptic number.

It is an amenable number.

12102120111221 is a deficient number, since it is larger than the sum of its proper divisors (1918339979083).

12102120111221 is an equidigital number, since it uses as much as digits as its factorization.

12102120111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23683209691.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12102120111221 its reverse (12211102120121), we get a palindrome (24313222231342).

The spelling of 12102120111221 in words is "twelve trillion, one hundred two billion, one hundred twenty million, one hundred eleven thousand, two hundred twenty-one".