2421242421421 has 4 divisors (see below), whose sum is σ = 2526513831072. Its totient is φ = 2315971011772.

The previous prime is 2421242421359. The next prime is 2421242421443. The reversal of 2421242421421 is 1241242421242.

It is a happy number.

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 2421242421421 - 2²³ = 2421234032813 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 (2421242427421) 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, 52635704791 + ... + 52635704836.

It is an arithmetic number, because the mean of its divisors is an integer number (631628457768).

Almost surely, 2^{2421242421421} is an apocalyptic number.

It is an amenable number.

2421242421421 is a deficient number, since it is larger than the sum of its proper divisors (105271409651).

2421242421421 is a wasteful number, since it uses less digits than its factorization.

2421242421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105271409650.

The product of its digits is 16384, while the sum is 31.

Adding to 2421242421421 its reverse (1241242421242), we get a palindrome (3662484842663).

The spelling of 2421242421421 in words is "two trillion, four hundred twenty-one billion, two hundred forty-two million, four hundred twenty-one thousand, four hundred twenty-one".