2123126424 has 128 divisors (see below), whose sum is σ = 6422400000. Its totient is φ = 647305344.

The previous prime is 2123126407. The next prime is 2123126429. The reversal of 2123126424 is 4246213212.

2123126424 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 12 + 642 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123126429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110097 + ... + 127935.

It is an arithmetic number, because the mean of its divisors is an integer number (50175000).

Almost surely, 2^2123126424 is an apocalyptic number.

2123126424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2123126424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3211200000).

2123126424 is an abundant number, since it is smaller than the sum of its proper divisors (4299273576).

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

2123126424 is a wasteful number, since it uses less digits than its factorization.

2123126424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17902 (or 17892 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 2123126424 is about 46077.3960201746. The cubic root of 2123126424 is about 1285.2628417601.

Adding to 2123126424 its reverse (4246213212), we get a palindrome (6369339636).

The spelling of 2123126424 in words is "two billion, one hundred twenty-three million, one hundred twenty-six thousand, four hundred twenty-four".