12221121109 has 16 divisors (see below), whose sum is σ = 13108011840. Its totient is φ = 11353155840.

The previous prime is 12221121079. The next prime is 12221121161. The reversal of 12221121109 is 90112112221.

12221121109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12221121109 - 2⁷ = 12221120981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12221121109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221121169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1818247 + ... + 1824955.

It is an arithmetic number, because the mean of its divisors is an integer number (819250740).

Almost surely, 2^12221121109 is an apocalyptic number.

It is an amenable number.

12221121109 is a deficient number, since it is larger than the sum of its proper divisors (886890731).

12221121109 is a wasteful number, since it uses less digits than its factorization.

12221121109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8100.

The product of its (nonzero) digits is 144, while the sum is 22.

It can be divided in two parts, 1222112 and 1109, that added together give a palindrome (1223221).

The spelling of 12221121109 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred nine".