43421321125 has 32 divisors (see below), whose sum is σ = 66695166720. Its totient is φ = 27484257600.

The previous prime is 43421321123. The next prime is 43421321143. The reversal of 43421321125 is 52112312434.

It is not a de Polignac number, because 43421321125 - 2¹ = 43421321123 is a prime.

It is a super-2 number, since 2×43421321125² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43421321093 and 43421321102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43421321123) 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 31 ways as a sum of consecutive naturals, for example, 1897255 + ... + 1920004.

It is an arithmetic number, because the mean of its divisors is an integer number (2084223960).

Almost surely, 2^43421321125 is an apocalyptic number.

It is an amenable number.

43421321125 is a deficient number, since it is larger than the sum of its proper divisors (23273845595).

43421321125 is a wasteful number, since it uses less digits than its factorization.

43421321125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817294 (or 3817284 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

Adding to 43421321125 its reverse (52112312434), we get a palindrome (95533633559).

The spelling of 43421321125 in words is "forty-three billion, four hundred twenty-one million, three hundred twenty-one thousand, one hundred twenty-five".