2100120213123 has 12 divisors (see below), whose sum is σ = 3044226084120. Its totient is φ = 1395132860736.

The previous prime is 2100120213019. The next prime is 2100120213133. The reversal of 2100120213123 is 3213120210012.

2100120213123 is a `hidden beast` number, since 210 + 0 + 120 + 21 + 312 + 3 = 666.

It is not a de Polignac number, because 2100120213123 - 2²⁴ = 2100103435907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100120213096 and 2100120213105.

It is not an unprimeable number, because it can be changed into a prime (2100120213133) 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 11 ways as a sum of consecutive naturals, for example, 412270758 + ... + 412275851.

It is an arithmetic number, because the mean of its divisors is an integer number (253685507010).

Almost surely, 2^{2100120213123} is an apocalyptic number.

2100120213123 is a deficient number, since it is larger than the sum of its proper divisors (944105870997).

2100120213123 is a wasteful number, since it uses less digits than its factorization.

2100120213123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824546898 (or 824546895 counting only the distinct ones).

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

Adding to 2100120213123 its reverse (3213120210012), we get a palindrome (5313240423135).

The spelling of 2100120213123 in words is "two trillion, one hundred billion, one hundred twenty million, two hundred thirteen thousand, one hundred twenty-three".