12012121021 has 8 divisors (see below), whose sum is σ = 12270893184. Its totient is φ = 11753482080.

The previous prime is 12012121007. The next prime is 12012121039.

12012121021 is nontrivially palindromic in base 10.

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 12012121021 - 2¹¹ = 12012118973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012120992 and 12012121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012121061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161041 + ... + 223513.

It is an arithmetic number, because the mean of its divisors is an integer number (1533861648).

Almost surely, 2^12012121021 is an apocalyptic number.

It is an amenable number.

12012121021 is a deficient number, since it is larger than the sum of its proper divisors (258772163).

12012121021 is an equidigital number, since it uses as much as digits as its factorization.

12012121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66611.

The product of its (nonzero) digits is 16, while the sum is 13.

The spelling of 12012121021 in words is "twelve billion, twelve million, one hundred twenty-one thousand, twenty-one".