2120042503423 has 4 divisors (see below), whose sum is σ = 2283122696008. Its totient is φ = 1956962310840.

The previous prime is 2120042503393. The next prime is 2120042503471. The reversal of 2120042503423 is 3243052400212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2120042503423 - 2²⁹ = 2119505632511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120042503391 and 2120042503400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120042503823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81540096273 + ... + 81540096298.

It is an arithmetic number, because the mean of its divisors is an integer number (570780674002).

Almost surely, 2^{2120042503423} is an apocalyptic number.

2120042503423 is a deficient number, since it is larger than the sum of its proper divisors (163080192585).

2120042503423 is a wasteful number, since it uses less digits than its factorization.

2120042503423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163080192584.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 2120042503423 its reverse (3243052400212), we get a palindrome (5363094903635).

The spelling of 2120042503423 in words is "two trillion, one hundred twenty billion, forty-two million, five hundred three thousand, four hundred twenty-three".