43242101421 has 4 divisors (see below), whose sum is σ = 57656135232. Its totient is φ = 28828067612.

The previous prime is 43242101401. The next prime is 43242101503. The reversal of 43242101421 is 12410124234.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43242101421 - 2⁷ = 43242101293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43242101391 and 43242101400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43242101401) 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 3 ways as a sum of consecutive naturals, for example, 7207016901 + ... + 7207016906.

It is an arithmetic number, because the mean of its divisors is an integer number (14414033808).

Almost surely, 2^43242101421 is an apocalyptic number.

It is an amenable number.

43242101421 is a deficient number, since it is larger than the sum of its proper divisors (14414033811).

43242101421 is a wasteful number, since it uses less digits than its factorization.

43242101421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14414033810.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 43242101421 its reverse (12410124234), we get a palindrome (55652225655).

The spelling of 43242101421 in words is "forty-three billion, two hundred forty-two million, one hundred one thousand, four hundred twenty-one".