2421043020121 has 12 divisors (see below), whose sum is σ = 2688580972756. Its totient is φ = 2178258001920.

The previous prime is 2421043020061. The next prime is 2421043020173. The reversal of 2421043020121 is 1210203401242.

It can be written as a sum of positive squares in 2 ways, for example, as 409011411600 + 2012031608521 = 639540^2 + 1418461^2 .

It is not a de Polignac number, because 2421043020121 - 2³³ = 2412453085529 is a prime.

It is a super-3 number, since 3×2421043020121³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2421043020092 and 2421043020101.

It is not an unprimeable number, because it can be changed into a prime (2421043020191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103125480 + ... + 103148953.

Almost surely, 2^{2421043020121} is an apocalyptic number.

It is an amenable number.

2421043020121 is a deficient number, since it is larger than the sum of its proper divisors (267537952635).

2421043020121 is a wasteful number, since it uses less digits than its factorization.

2421043020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206274552 (or 206274541 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 2421043020121 its reverse (1210203401242), we get a palindrome (3631246421363).

The spelling of 2421043020121 in words is "two trillion, four hundred twenty-one billion, forty-three million, twenty thousand, one hundred twenty-one".