2124100420 has 24 divisors (see below), whose sum is σ = 4803735384. Its totient is φ = 784283136.

The previous prime is 2124100379. The next prime is 2124100427. The reversal of 2124100420 is 240014212.

It can be written as a sum of positive squares in 4 ways, for example, as 35976004 + 2088124416 = 5998^2 + 45696^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2124100394 and 2124100403.

It is not an unprimeable number, because it can be changed into a prime (2124100427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4084549 + ... + 4085068.

It is an arithmetic number, because the mean of its divisors is an integer number (200155641).

Almost surely, 2^2124100420 is an apocalyptic number.

2124100420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2124100420 is an abundant number, since it is smaller than the sum of its proper divisors (2679634964).

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

2124100420 is a wasteful number, since it uses less digits than its factorization.

2124100420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8169639 (or 8169637 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2124100420 is about 46087.9639385382. The cubic root of 2124100420 is about 1285.4593521943.

Adding to 2124100420 its reverse (240014212), we get a palindrome (2364114632).

The spelling of 2124100420 in words is "two billion, one hundred twenty-four million, one hundred thousand, four hundred twenty".