12021002122121 has 8 divisors (see below), whose sum is σ = 12062148955584. Its totient is φ = 11979856102320.

The previous prime is 12021002122109. The next prime is 12021002122169. The reversal of 12021002122121 is 12122120012021.

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 12021002122121 - 2²² = 12020997927817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12021002122121.

It is not an unprimeable number, because it can be changed into a prime (12021002122721) 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, 54449660 + ... + 54669986.

It is an arithmetic number, because the mean of its divisors is an integer number (1507768619448).

Almost surely, 2^{12021002122121} is an apocalyptic number.

It is an amenable number.

12021002122121 is a deficient number, since it is larger than the sum of its proper divisors (41146833463).

12021002122121 is a wasteful number, since it uses less digits than its factorization.

12021002122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406831.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021002122121 its reverse (12122120012021), we get a palindrome (24143122134142).

The spelling of 12021002122121 in words is "twelve trillion, twenty-one billion, two million, one hundred twenty-two thousand, one hundred twenty-one".