43121320100 has 36 divisors (see below), whose sum is σ = 93626132544. Its totient is φ = 17238782880.

The previous prime is 43121320093. The next prime is 43121320111. The reversal of 43121320100 is 102312134.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57377 + ... + 299223.

It is an arithmetic number, because the mean of its divisors is an integer number (2600725904).

Almost surely, 2^43121320100 is an apocalyptic number.

It is an amenable number.

43121320100 is an abundant number, since it is smaller than the sum of its proper divisors (50504812444).

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

43121320100 is a wasteful number, since it uses less digits than its factorization.

43121320100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243644 (or 243637 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 43121320100 its reverse (102312134), we get a palindrome (43223632234).

The spelling of 43121320100 in words is "forty-three billion, one hundred twenty-one million, three hundred twenty thousand, one hundred".