2421433021 has 4 divisors (see below), whose sum is σ = 2767352032. Its totient is φ = 2075514012.

The previous prime is 2421433009. The next prime is 2421433081. The reversal of 2421433021 is 1203341242.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1203341242 = 2 ⋅601670621.

It is a cyclic number.

It is not a de Polignac number, because 2421433021 - 2⁵ = 2421432989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2421432983 and 2421433001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421433081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172959495 + ... + 172959508.

It is an arithmetic number, because the mean of its divisors is an integer number (691838008).

Almost surely, 2^2421433021 is an apocalyptic number.

It is an amenable number.

2421433021 is a deficient number, since it is larger than the sum of its proper divisors (345919011).

2421433021 is an equidigital number, since it uses as much as digits as its factorization.

2421433021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345919010.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2421433021 is about 49208.0584965512. The cubic root of 2421433021 is about 1342.8396418223.

Adding to 2421433021 its reverse (1203341242), we get a palindrome (3624774263).

The spelling of 2421433021 in words is "two billion, four hundred twenty-one million, four hundred thirty-three thousand, twenty-one".