424332243021 has 4 divisors (see below), whose sum is σ = 565776324032. Its totient is φ = 282888162012.

The previous prime is 424332242969. The next prime is 424332243053. The reversal of 424332243021 is 120342233424.

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 de Polignac number, because none of the positive numbers 2^k-424332243021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 424332243021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424332243421) 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, 70722040501 + ... + 70722040506.

It is an arithmetic number, because the mean of its divisors is an integer number (141444081008).

Almost surely, 2^424332243021 is an apocalyptic number.

It is an amenable number.

424332243021 is a deficient number, since it is larger than the sum of its proper divisors (141444081011).

424332243021 is a wasteful number, since it uses less digits than its factorization.

424332243021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141444081010.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 424332243021 its reverse (120342233424), we get a palindrome (544674476445).

The spelling of 424332243021 in words is "four hundred twenty-four billion, three hundred thirty-two million, two hundred forty-three thousand, twenty-one".