2421330421 has 4 divisors (see below), whose sum is σ = 2421578700. Its totient is φ = 2421082144.

The previous prime is 2421330413. The next prime is 2421330433. The reversal of 2421330421 is 1240331242.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1522170225 + 899160196 = 39015^2 + 29986^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421330421 - 2³ = 2421330413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2421330392 and 2421330401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421300421) 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, 108886 + ... + 129223.

It is an arithmetic number, because the mean of its divisors is an integer number (605394675).

Almost surely, 2^2421330421 is an apocalyptic number.

It is an amenable number.

2421330421 is a deficient number, since it is larger than the sum of its proper divisors (248279).

2421330421 is a wasteful number, since it uses less digits than its factorization.

2421330421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248278.

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

The square root of 2421330421 is about 49207.0159733345. The cubic root of 2421330421 is about 1342.8206754648.

Adding to 2421330421 its reverse (1240331242), we get a palindrome (3661661663).

The spelling of 2421330421 in words is "two billion, four hundred twenty-one million, three hundred thirty thousand, four hundred twenty-one".