43410421021 has 4 divisors (see below), whose sum is σ = 47356822944. Its totient is φ = 39464019100.

The previous prime is 43410420883. The next prime is 43410421027. The reversal of 43410421021 is 12012401434.

It is a happy number.

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 not a de Polignac number, because 43410421021 - 2¹⁵ = 43410388253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43410420983 and 43410421001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43410421027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1973200945 + ... + 1973200966.

It is an arithmetic number, because the mean of its divisors is an integer number (11839205736).

Almost surely, 2^43410421021 is an apocalyptic number.

It is an amenable number.

43410421021 is a deficient number, since it is larger than the sum of its proper divisors (3946401923).

43410421021 is a wasteful number, since it uses less digits than its factorization.

43410421021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3946401922.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 43410421021 its reverse (12012401434), we get a palindrome (55422822455).

The spelling of 43410421021 in words is "forty-three billion, four hundred ten million, four hundred twenty-one thousand, twenty-one".