12021110121121 has 16 divisors (see below), whose sum is σ = 12097838825280. Its totient is φ = 11944631296000.

The previous prime is 12021110121109. The next prime is 12021110121127. The reversal of 12021110121121 is 12112101112021.

It is a cyclic number.

It is not a de Polignac number, because 12021110121121 - 2³⁷ = 11883671167649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021110121095 and 12021110121104.

It is not an unprimeable number, because it can be changed into a prime (12021110121127) 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, 390166365 + ... + 390197173.

It is an arithmetic number, because the mean of its divisors is an integer number (756114926580).

Almost surely, 2^{12021110121121} is an apocalyptic number.

It is an amenable number.

12021110121121 is a deficient number, since it is larger than the sum of its proper divisors (76728704159).

12021110121121 is a wasteful number, since it uses less digits than its factorization.

12021110121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34784.

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

Adding to 12021110121121 its reverse (12112101112021), we get a palindrome (24133211233142).

The spelling of 12021110121121 in words is "twelve trillion, twenty-one billion, one hundred ten million, one hundred twenty-one thousand, one hundred twenty-one".