12021001220121 has 8 divisors (see below), whose sum is σ = 16035160189440. Its totient is φ = 8010421532112.

The previous prime is 12021001220101. The next prime is 12021001220147. The reversal of 12021001220121 is 12102210012021.

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

It is not a de Polignac number, because 12021001220121 - 2⁵ = 12021001220089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12021001220121.

It is not an unprimeable number, because it can be changed into a prime (12021001220101) 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, 894812490 + ... + 894825923.

It is an arithmetic number, because the mean of its divisors is an integer number (2004395023680).

Almost surely, 2^{12021001220121} is an apocalyptic number.

It is an amenable number.

12021001220121 is a deficient number, since it is larger than the sum of its proper divisors (4014158969319).

12021001220121 is a wasteful number, since it uses less digits than its factorization.

12021001220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789640655.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12021001220121 its reverse (12102210012021), we get a palindrome (24123211232142).

The spelling of 12021001220121 in words is "twelve trillion, twenty-one billion, one million, two hundred twenty thousand, one hundred twenty-one".