43121130400 has 144 divisors (see below), whose sum is σ = 106440687360. Its totient is φ = 17057664000.

The previous prime is 43121130361. The next prime is 43121130443. The reversal of 43121130400 is 403112134.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32494537 + ... + 32495863.

It is an arithmetic number, because the mean of its divisors is an integer number (739171440).

Almost surely, 2^43121130400 is an apocalyptic number.

43121130400 is a gapful number since it is divisible by the number (40) 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 43121130400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53220343680).

43121130400 is an abundant number, since it is smaller than the sum of its proper divisors (63319556960).

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

43121130400 is a wasteful number, since it uses less digits than its factorization.

43121130400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767 (or 1754 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 43121130400 its reverse (403112134), we get a palindrome (43524242534).

The spelling of 43121130400 in words is "forty-three billion, one hundred twenty-one million, one hundred thirty thousand, four hundred".