2143421245240 has 32 divisors (see below), whose sum is σ = 5261124875760. Its totient is φ = 779425907200.

The previous prime is 2143421245111. The next prime is 2143421245241. The reversal of 2143421245240 is 425421243412.

It is a junction number, because it is equal to n+sod(n) for n = 2143421245196 and 2143421245205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143421245241) 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 7 ways as a sum of consecutive naturals, for example, 2435705521 + ... + 2435706400.

Almost surely, 2^{2143421245240} is an apocalyptic number.

2143421245240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143421245240 is an abundant number, since it is smaller than the sum of its proper divisors (3117703630520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2143421245240 is a wasteful number, since it uses less digits than its factorization.

2143421245240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4871411943 (or 4871411939 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 34.

Adding to 2143421245240 its reverse (425421243412), we get a palindrome (2568842488652).

The spelling of 2143421245240 in words is "two trillion, one hundred forty-three billion, four hundred twenty-one million, two hundred forty-five thousand, two hundred forty".