2143240420123 has 4 divisors (see below), whose sum is σ = 2338080458328. Its totient is φ = 1948400381920.

The previous prime is 2143240420003. The next prime is 2143240420127. The reversal of 2143240420123 is 3210240423412.

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 2143240420123 - 2¹⁷ = 2143240289051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2143240420091 and 2143240420100.

It is not an unprimeable number, because it can be changed into a prime (2143240420127) 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, 97420019086 + ... + 97420019107.

It is an arithmetic number, because the mean of its divisors is an integer number (584520114582).

Almost surely, 2^{2143240420123} is an apocalyptic number.

2143240420123 is a deficient number, since it is larger than the sum of its proper divisors (194840038205).

2143240420123 is a wasteful number, since it uses less digits than its factorization.

2143240420123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194840038204.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 2143240420123 its reverse (3210240423412), we get a palindrome (5353480843535).

The spelling of 2143240420123 in words is "two trillion, one hundred forty-three billion, two hundred forty million, four hundred twenty thousand, one hundred twenty-three".