2123130440 has 32 divisors (see below), whose sum is σ = 4779432000. Its totient is φ = 848827584.

The previous prime is 2123130439. The next prime is 2123130473. The reversal of 2123130440 is 440313212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74981 + ... + 99339.

It is an arithmetic number, because the mean of its divisors is an integer number (149357250).

Almost surely, 2^2123130440 is an apocalyptic number.

2123130440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123130440 is an abundant number, since it is smaller than the sum of its proper divisors (2656301560).

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

2123130440 is a wasteful number, since it uses less digits than its factorization.

2123130440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26549 (or 26545 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2123130440 is about 46077.4395990055. The cubic root of 2123130440 is about 1285.2636521393.

Adding to 2123130440 its reverse (440313212), we get a palindrome (2563443652).

The spelling of 2123130440 in words is "two billion, one hundred twenty-three million, one hundred thirty thousand, four hundred forty".