20212102020121 has 16 divisors (see below), whose sum is σ = 22316487266880. Its totient is φ = 18152558744320.

The previous prime is 20212102020113. The next prime is 20212102020167. The reversal of 20212102020121 is 12102020121202.

It is a happy number.

It is not a de Polignac number, because 20212102020121 - 2³ = 20212102020113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212102020095 and 20212102020104.

It is not an unprimeable number, because it can be changed into a prime (20212102030121) 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 15 ways as a sum of consecutive naturals, for example, 7737460 + ... + 10014613.

It is an arithmetic number, because the mean of its divisors is an integer number (1394780454180).

Almost surely, 2^{20212102020121} is an apocalyptic number.

It is an amenable number.

20212102020121 is a deficient number, since it is larger than the sum of its proper divisors (2104385246759).

20212102020121 is a wasteful number, since it uses less digits than its factorization.

20212102020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17753336.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20212102020121 its reverse (12102020121202), we get a palindrome (32314122141323).

It can be divided in two parts, 202 and 12102020121, that multiplied together give a palindrome (2444608064442).

The spelling of 20212102020121 in words is "twenty trillion, two hundred twelve billion, one hundred two million, twenty thousand, one hundred twenty-one".