2421420421 has 8 divisors (see below), whose sum is σ = 2768364864. Its totient is φ = 2074732800.

The previous prime is 2421420403. The next prime is 2421420457. The reversal of 2421420421 is 1240241242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2421420421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2421420392 and 2421420401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421421421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43555 + ... + 82096.

It is an arithmetic number, because the mean of its divisors is an integer number (346045608).

Almost surely, 2^2421420421 is an apocalyptic number.

It is an amenable number.

2421420421 is a deficient number, since it is larger than the sum of its proper divisors (346944443).

2421420421 is a wasteful number, since it uses less digits than its factorization.

2421420421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128411.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 2421420421 is about 49207.9304685739. The cubic root of 2421420421 is about 1342.8373126493.

Adding to 2421420421 its reverse (1240241242), we get a palindrome (3661661663).

The spelling of 2421420421 in words is "two billion, four hundred twenty-one million, four hundred twenty thousand, four hundred twenty-one".