12020121021 has 8 divisors (see below), whose sum is σ = 16058316960. Its totient is φ = 7997669552.

The previous prime is 12020121013. The next prime is 12020121073. The reversal of 12020121021 is 12012102021.

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 12020121021 - 2³ = 12020121013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12020120988 and 12020121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020122021) 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, 3934335 + ... + 3937388.

It is an arithmetic number, because the mean of its divisors is an integer number (2007289620).

Almost surely, 2^12020121021 is an apocalyptic number.

It is an amenable number.

12020121021 is a deficient number, since it is larger than the sum of its proper divisors (4038195939).

12020121021 is an equidigital number, since it uses as much as digits as its factorization.

12020121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7872235.

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

Adding to 12020121021 its reverse (12012102021), we get a palindrome (24032223042).

The spelling of 12020121021 in words is "twelve billion, twenty million, one hundred twenty-one thousand, twenty-one".