12021332121 has 16 divisors (see below), whose sum is σ = 17927329920. Its totient is φ = 7961144400.

The previous prime is 12021332047. The next prime is 12021332149. The reversal of 12021332121 is 12123312021.

12021332121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12021332121 - 2¹⁴ = 12021315737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021332094 and 12021332103.

It is not an unprimeable number, because it can be changed into a prime (12021332221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470210 + ... + 1478363.

It is an arithmetic number, because the mean of its divisors is an integer number (1120458120).

Almost surely, 2^12021332121 is an apocalyptic number.

It is an amenable number.

12021332121 is a deficient number, since it is larger than the sum of its proper divisors (5905997799).

12021332121 is a wasteful number, since it uses less digits than its factorization.

12021332121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2948733 (or 2948727 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12021332121 its reverse (12123312021), we get a palindrome (24144644142).

The spelling of 12021332121 in words is "twelve billion, twenty-one million, three hundred thirty-two thousand, one hundred twenty-one".