12012333121 has 12 divisors (see below), whose sum is σ = 12688604544. Its totient is φ = 11370439800.

The previous prime is 12012333041. The next prime is 12012333133. The reversal of 12012333121 is 12133321021.

It is not a de Polignac number, because 12012333121 - 2⁹ = 12012332609 is a prime.

It is a super-3 number, since 3×12012333121³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012333191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430876 + ... + 457906.

It is an arithmetic number, because the mean of its divisors is an integer number (1057383712).

Almost surely, 2^12012333121 is an apocalyptic number.

It is an amenable number.

12012333121 is a deficient number, since it is larger than the sum of its proper divisors (676271423).

12012333121 is a wasteful number, since it uses less digits than its factorization.

12012333121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28300 (or 28281 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12012333121 its reverse (12133321021), we get a palindrome (24145654142).

The spelling of 12012333121 in words is "twelve billion, twelve million, three hundred thirty-three thousand, one hundred twenty-one".