2421224621 has 4 divisors (see below), whose sum is σ = 2445197244. Its totient is φ = 2397252000.

The previous prime is 2421224593. The next prime is 2421224639. The reversal of 2421224621 is 1264221242.

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 1839208996 + 582015625 = 42886^2 + 24125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2421224621 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 (2421224921) 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, 11986160 + ... + 11986361.

It is an arithmetic number, because the mean of its divisors is an integer number (611299311).

Almost surely, 2^2421224621 is an apocalyptic number.

It is an amenable number.

2421224621 is a deficient number, since it is larger than the sum of its proper divisors (23972623).

2421224621 is a wasteful number, since it uses less digits than its factorization.

2421224621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23972622.

The product of its digits is 3072, while the sum is 26.

The square root of 2421224621 is about 49205.9409116420. The cubic root of 2421224621 is about 1342.8011170028.

Adding to 2421224621 its reverse (1264221242), we get a palindrome (3685445863).

The spelling of 2421224621 in words is "two billion, four hundred twenty-one million, two hundred twenty-four thousand, six hundred twenty-one".