12030021121 has 16 divisors (see below), whose sum is σ = 12309712128. Its totient is φ = 11753280000.

The previous prime is 12030021089. The next prime is 12030021127. The reversal of 12030021121 is 12112003021.

It is a cyclic number.

It is not a de Polignac number, because 12030021121 - 2⁵ = 12030021089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12030021127) 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, 7088145 + ... + 7089841.

It is an arithmetic number, because the mean of its divisors is an integer number (769357008).

Almost surely, 2^12030021121 is an apocalyptic number.

It is an amenable number.

12030021121 is a deficient number, since it is larger than the sum of its proper divisors (279691007).

12030021121 is a wasteful number, since it uses less digits than its factorization.

12030021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12030021121 its reverse (12112003021), we get a palindrome (24142024142).

The spelling of 12030021121 in words is "twelve billion, thirty million, twenty-one thousand, one hundred twenty-one".