12121110212021 has 16 divisors (see below), whose sum is σ = 12779055725184. Its totient is φ = 11474086677504.

The previous prime is 12121110212009. The next prime is 12121110212027. The reversal of 12121110212021 is 12021201112121.

It is a cyclic number.

It is not a de Polignac number, because 12121110212021 - 2³⁸ = 11846232305077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121110212027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58565306 + ... + 58771908.

It is an arithmetic number, because the mean of its divisors is an integer number (798690982824).

Almost surely, 2^{12121110212021} is an apocalyptic number.

It is an amenable number.

12121110212021 is a deficient number, since it is larger than the sum of its proper divisors (657945513163).

12121110212021 is a wasteful number, since it uses less digits than its factorization.

12121110212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233020.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12121110212021 its reverse (12021201112121), we get a palindrome (24142311324142).

The spelling of 12121110212021 in words is "twelve trillion, one hundred twenty-one billion, one hundred ten million, two hundred twelve thousand, twenty-one".