12102221121 has 16 divisors (see below), whose sum is σ = 16959022080. Its totient is φ = 7661831760.

The previous prime is 12102221111. The next prime is 12102221141. The reversal of 12102221121 is 12112220121.

It is not a de Polignac number, because 12102221121 - 2¹⁵ = 12102188353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12102221121.

It is not an unprimeable number, because it can be changed into a prime (12102221111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621325 + ... + 640506.

It is an arithmetic number, because the mean of its divisors is an integer number (1059938880).

Almost surely, 2^12102221121 is an apocalyptic number.

It is an amenable number.

12102221121 is a deficient number, since it is larger than the sum of its proper divisors (4856800959).

12102221121 is a wasteful number, since it uses less digits than its factorization.

12102221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261996.

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

Adding to 12102221121 its reverse (12112220121), we get a palindrome (24214441242).

The spelling of 12102221121 in words is "twelve billion, one hundred two million, two hundred twenty-one thousand, one hundred twenty-one".