2121023120013 has 24 divisors (see below), whose sum is σ = 3560716785600. Its totient is φ = 1191470612544.

The previous prime is 2121023119987. The next prime is 2121023120059. The reversal of 2121023120013 is 3100213201212.

2121023120013 is a `hidden beast` number, since 21 + 210 + 231 + 200 + 1 + 3 = 666.

It is not a de Polignac number, because 2121023120013 - 2⁶ = 2121023119949 is a prime.

It is a super-2 number, since 2×2121023120013² (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 (2121023120093) 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, 285310128 + ... + 285317561.

It is an arithmetic number, because the mean of its divisors is an integer number (148363199400).

Almost surely, 2^{2121023120013} is an apocalyptic number.

It is an amenable number.

2121023120013 is a deficient number, since it is larger than the sum of its proper divisors (1439693665587).

2121023120013 is a wasteful number, since it uses less digits than its factorization.

2121023120013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570627761 (or 570627758 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2121023120013 its reverse (3100213201212), we get a palindrome (5221236321225).

The spelling of 2121023120013 in words is "two trillion, one hundred twenty-one billion, twenty-three million, one hundred twenty thousand, thirteen".