12012012021 has 8 divisors (see below), whose sum is σ = 16858964320. Its totient is φ = 7586533872.

The previous prime is 12012012017. The next prime is 12012012041. The reversal of 12012012021 is 12021021021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12012012021 - 2² = 12012012017 is a prime.

It is a super-3 number, since 3×12012012021³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012011988 and 12012012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012012041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105368470 + ... + 105368583.

It is an arithmetic number, because the mean of its divisors is an integer number (2107370540).

Almost surely, 2^12012012021 is an apocalyptic number.

It is an amenable number.

12012012021 is a deficient number, since it is larger than the sum of its proper divisors (4846952299).

12012012021 is a wasteful number, since it uses less digits than its factorization.

12012012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210737075.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12012012021 its reverse (12021021021), we get a palindrome (24033033042).

The spelling of 12012012021 in words is "twelve billion, twelve million, twelve thousand, twenty-one".