2121242056263 has 24 divisors (see below), whose sum is σ = 3342611450880. Its totient is φ = 1285582703760.

The previous prime is 2121242056259. The next prime is 2121242056291. The reversal of 2121242056263 is 3626502421212.

2121242056263 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 2 + 4 + 20 + 5 + 626 + 3 = 666.

It is not a de Polignac number, because 2121242056263 - 2² = 2121242056259 is a prime.

It is a super-2 number, since 2×2121242056263² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121242056243) 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 23 ways as a sum of consecutive naturals, for example, 10295268 + ... + 10499286.

It is an arithmetic number, because the mean of its divisors is an integer number (139275477120).

Almost surely, 2^{2121242056263} is an apocalyptic number.

2121242056263 is a deficient number, since it is larger than the sum of its proper divisors (1221369394617).

2121242056263 is a wasteful number, since it uses less digits than its factorization.

2121242056263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309059 (or 309056 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 2121242056263 its reverse (3626502421212), we get a palindrome (5747744477475).

The spelling of 2121242056263 in words is "two trillion, one hundred twenty-one billion, two hundred forty-two million, fifty-six thousand, two hundred sixty-three".