12102201021121 has 8 divisors (see below), whose sum is σ = 12879141370920. Its totient is φ = 11332488023808.

The previous prime is 12102201021067. The next prime is 12102201021151. The reversal of 12102201021121 is 12112010220121.

It can be written as a sum of positive squares in 4 ways, for example, as 9725790704400 + 2376410316721 = 3118620^2 + 1541561^2 .

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 12102201021121 - 2⁷ = 12102201020993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12102201021095 and 12102201021104.

It is not an unprimeable number, because it can be changed into a prime (12102201021151) 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 7 ways as a sum of consecutive naturals, for example, 1806834666 + ... + 1806841363.

It is an arithmetic number, because the mean of its divisors is an integer number (1609892671365).

Almost surely, 2^{12102201021121} is an apocalyptic number.

It is an amenable number.

12102201021121 is a deficient number, since it is larger than the sum of its proper divisors (776940349799).

12102201021121 is a wasteful number, since it uses less digits than its factorization.

12102201021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3613676243.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12102201021121 its reverse (12112010220121), we get a palindrome (24214211241242).

The spelling of 12102201021121 in words is "twelve trillion, one hundred two billion, two hundred one million, twenty-one thousand, one hundred twenty-one".