243410042021 has 4 divisors (see below), whose sum is σ = 246838352544. Its totient is φ = 239981731500.

The previous prime is 243410042011. The next prime is 243410042063. The reversal of 243410042021 is 120240014342.

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 243410042021 - 2⁶ = 243410041957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243410042011) 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, 1714155155 + ... + 1714155296.

It is an arithmetic number, because the mean of its divisors is an integer number (61709588136).

Almost surely, 2^243410042021 is an apocalyptic number.

It is an amenable number.

243410042021 is a deficient number, since it is larger than the sum of its proper divisors (3428310523).

243410042021 is an equidigital number, since it uses as much as digits as its factorization.

243410042021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3428310522.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 243410042021 its reverse (120240014342), we get a palindrome (363650056363).

The spelling of 243410042021 in words is "two hundred forty-three billion, four hundred ten million, forty-two thousand, twenty-one".