2123412023440 has 20 divisors (see below), whose sum is σ = 4936932954684. Its totient is φ = 849364809344.

The previous prime is 2123412023419. The next prime is 2123412023441. The reversal of 2123412023440 is 443202143212.

It can be written as a sum of positive squares in 2 ways, for example, as 962431633296 + 1160980390144 = 981036^2 + 1077488^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 2123412023399 and 2123412023408.

It is not an unprimeable number, because it can be changed into a prime (2123412023441) 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, 13271325067 + ... + 13271325226.

Almost surely, 2^{2123412023440} is an apocalyptic number.

2123412023440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123412023440 is an abundant number, since it is smaller than the sum of its proper divisors (2813520931244).

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

2123412023440 is a wasteful number, since it uses less digits than its factorization.

2123412023440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26542650306 (or 26542650300 counting only the distinct ones).

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

Adding to 2123412023440 its reverse (443202143212), we get a palindrome (2566614166652).

The spelling of 2123412023440 in words is "two trillion, one hundred twenty-three billion, four hundred twelve million, twenty-three thousand, four hundred forty".